DIAGNOSING ENVOY/TRAILBLAZER LOW OIL PRESSURE (GM 4.2L)

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Diagnosing Envoy Low Oil Pressure - Part 2 • Diagnosing Envoy Low O...
Diagnosing Envoy/Trailblazer Low Oil Pressure (GM 4.2L). In this video I show how I changed the oil pressure switch on my 2004 GMC Envoy XLT to fix a low oil pressure problem. Oil pressure sensor replacement. Oil Pressure Low Stop Engine. Oil pressure gauge fluctuating. This is the same for the Chevy Trailblazer. My Envoy has the 4.2L I-6 engine with about 250,000 miles. GMC Envoy Problems
#lowoilpressure #kevinnadeau #GMCEnvoy
Diagnosing Envoy Low Oil Pressure - Part 2
• Diagnosing Envoy Low O...
Diagnosing Envoy Low Oil Pressure Part 3
• Diagnosing Envoy Low O... .
ACDelco D1843A GM Original Equipment Engine Oil Pressure Switch
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Oil Pressure Switch Socket
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[@DeenWaDonyah]

Great videos on cleaning the oil pick tube! I can tell that was huge project for you.I bot a 05 Trailblazer EXT (192k miles) which had same problem. I drive it for 20-30 mins, then at stoplight, I get the low oil pressure warning and "shut off the engine" message on console.This seems like a common problem for the 4.2l motor over 150k miles. I think Root Cause in most of these is Sludge buildup. Here are the things I've tried before I was finally able to fix the problem without taking car apart like you did:1) Added Seafoam. Problem persisted after driving 100 mi. Did not risk it. Moved to next step.2) Changed Oil & Filter to synthetic, and I added Rislone Oil Treatment. I wanted to clean the sludge (if any) slowly. I figured if that doesn't work, I'll do an Engine flush.3) Replaced Oil pressure sensor (I suspected this wasn't the cause, but did it anyway). I spent more and put on an AC Delco part at $65.I still had the problem for the 1st 100 or so mile, but not as often. It would seem the Rislone & Syn oil was doing a good job dissolving the sludge from oil pick up tube and other parts.The new oil pressure switch made no difference, but investment was worth it.4) Replaced the Variable Valve Timing (VVT) sensor even tho no codes showed up on car computer. Other KZbins showed how to change that. I bot cheapest one on Ebay for $13. I was surprised at how dark the old sensor was. There was sludge buildup on the screen!I think Oil pick up tube and VVT sensor are most vulnerable for sludge.I made sure to drive the car steady on highway (not city driving) to let the detergents in oil additive do their work. I didn't want to come to stops. Other additives could have probably did the trick as well.Today was the 1st time I drive the truck without getting this issue.It took little patience, and did tasks from easiest to the more complex. If problem happens again, I'll try an engine flush next. My goal here is to dissolve sludge on oil pickup tube without removing the oil pan which we know is a nightmare.thx

[@KevinNadeau]

Thanks! The next thing you could try is draining your oil, and then filling your oil pan only with parts cleaner to soak the pickup tube. Be sure to pour the parts cleaner through the dipstick tube and not into the engine. You might need about 2 to 3 quarts to fill the oil pan so the tube is submerged.

[@dbguru3055]

Funny you should mention!! I was thinking of exact same thing of soaking it with parts cleaner but didn't want to pour into engine. Using the dipstick is a GREAT idea! Thx!

[@ljnuccio5868]

Did the problem ever come back or did that due the trick ?

[@strikeforce2525]

I did not want to take the engine apart or remove the rack n pinion just to get the oil pan to drop on my 2004 Envoy so I could clean the pickup tube. In this Video or the next one Kevin replaces the engine oil with kerosene and this does not work for him maybe he did not leave it in their long enough. I removed the oil and filter in my envoy. Then put a new filter on and replaced the engine oil with 2 Gal of diesel fuel. I let that sit in the engine for 3 days starting the engine once or twice a day for no more than 10 seconds. The now Black diesel was drained and filter removed next added new filter and New Oil and Oil pressure is better than ever.

[@shawnpatrick5452]

I would have poured 1 or maybe even 2 quartz kerosene or diesel fuel riding with the old oil then drove the trailvoy around for 20 miles maybe more then change the oil I've did this to a lot of different Motors cars machines just about anything works every time

[@TNCelt1]

Just what I was looking for. Thank you! My oil pressure went to "0" while running fine, and had plenty of oil when I stopped to check it. Restarted, pressure went to 40, and then back to 0 after a minute or so of driving. Looks good now! Thanks!

[@TNCelt1]

Update on my situation; the pressure switch was not the culprit. It was sludge that was strangling the engine as it vaccumed up the sludge onto the intake screen. As soon as you turn the engine off, the suction stopped, which would temporarily allow the pressure to increase, and then drop again. It ended up destroying the engine and we did an autopsy on the old engine after putting a used/newer engine on. I've even heard of skilled technicians calculating where they could tap and drill into the bottom of the oil pan to gain access to the screen on the oil intake tube. Hopefully an overnight parts cleaner soak could help it dissolve and drain. Good luck.

[@thomasschuler7432]

Also I replaced on my mother in laws truck the throttle positioning sensor and throttle control valve. I still had problems with it AFTER replacing them ... I stumbled onto a video before I gave up saying to ALWAYS disconnect the battery for 5 or more minutes to rest the computer in the vehicle to adjust itself to the new parts and it worked. I have also since done this on my vehicle when I changed out other sensors.. works every time. Thank you for making note of that also.

[@KevinNadeau]

I'm glad the video helped with you project. I appreciate your support.

[@Mike_The_Hog_A_Nator]

Great info. I own a beautiful 2002 Blazer ZR2 with the 4.3 Vortec & 300k miles on her. It'll tick when it gets a quarter of a qrt. low on oil. I deleted my leaky oil cooler lines & gained a lot of pressure. I did change my oil pressure switch/sensor located behind the distributor but, it didn't make a difference. My pressure runs around 20 at idle & 40-45 running. It'll hit 50 on a fresh oil change.

[@KevinNadeau]

👍

[@bandittweintraub]

as an owner of an 05' GMC Envoy SLT and 07' Chevy Trailblazer LT, (both having the 4.2) I'm glad I stumbled upon these. your video on how to change plugs and coils helped the Envoy immensely. she had a bad random misfire.

[@Agilepickleunite]

Still own them all now

[@dwaynemeroin3101]

Yep. Just happened at 230,000 miles. This has been such a good truck.

[@KevinNadeau]

Hope you're able to fix your low oil pressure.

[@dwaynemeroin3101]

@@KevinNadeau thanks, Kevin. This was actually one of the easiest fixes I've done. I bought the part, a regular 1-1/6 deep socket, took off the front tire, unplug, and replace. And yes, oil was leaking through to the connector side. It wasn't even in very tight, which surprised me. I think my 2003 envoy I6 is an awesome little car. Even changed the oil while it was on the jack stands. Always stress Jack stands in your videos. I know a guy that was pinned under a car without them. That would suck so bad.

[@strikeforce2525]

I did not want to take the engine apart or remove the rack n pinion just to get the oil pan to drop on my 2004 Envoy so I could clean the pickup tube. In this Video or the next one Kevin replaces the engine oil with kerosene and this does not work for him maybe he did not leave it in their long enough. I removed the oil and filter in my envoy. Then put a new filter on and replaced the engine oil with 2 Gal of diesel fuel. I let that sit in the engine for 3 days starting the engine once or twice a day for no more than 10 seconds. The now Black diesel was drained and filter removed next added new filter and New Oil and Oil pressure is better than ever.

[@Themadscientist1969]

Glad that was your issue... I have one with leaking (from connector) O/P switch,,(replaced)--then VVT solenoid (leaking from electrical connector) ,replaced..... Problem got alot better, but still doing it... :( (for 50 years I have been a Chevy guy, but with this modern JUNK they are peddeling, I'll stick with my 86 S-10 with 1967 full built small block 327 or my early model (01-04)daily driver SAAB cars (9-5 and 9-3---before GM finished them off also with bad decisions).... :( (still gave your video a thumbs up!)

[@shawnwithee3187]

You just described me as well. Just imagine electric cars, no more on the side of the road fixing for that matter none for old school like us. Batteries for those cars probably in the thousands so I'm gonna stay with a bus pass not lol. My 03 envoy is knocking like a 39 ford with 2 cyclenders working.

[@johnmccarthy4544]

Hello Kevin I don't know if you are monitoring your posts these days, however if you are I would like to hear your comments. Firstly a great series of videos and very well done under difficult circumstances. I am still chasing the fix on a 2002 4.2 trailblazer which showed the same issues as you had. Low oil pressure at idle. I replaced the oil pump, front cover, pick up tube and oil pressure switch twice and still have the low oil pressure light coming on after 15/20 minutes of driving. No DTC codes are shown. I have removed the dash check and replaced the stepper motor on the oil pressure gage and cleaned the throttle body, (to improve the idle speed). I thought I had it fixed with the idle speed going up to 620rpm from 550rpm. All this time I have had a master oil gage hooked up to the engine and it has always read a steady 75lb psi on cold start up, 45lb psi on driving around 2000rpm and 18lb psi at hot idle. These are all within GM's recommended specs. I have stuck with the 5w 30 mobile 1 full synthetic oil and a quality Hastings oil filter. The engine runs very well is quite and smooth and good for its 157000 miles. I an beginning to think that I either have a PCM issue or a throttle body issue as when you come down from 2000rpm the rpm fluctuates momentarily to under 500 rpm and then goes back up. It is at this point the low oil pressure warning comes on and the gage drops to zero. The master gage is still at 19lb psi. Has anyone to your knowledge solved this problem and fixed it? Thank you John

[@KevinNadeau]

Wow John, you have certainly hit all the areas I would've suggested checking/replacing. With all those parts you've replaced/checked/cleaned, the only thing I can think of you have left is to replace the bypass valve thats behind the oil filter. Other than that, it sounds like it might be an electrical gremlin😁.

[@johnnywessinger8899]

But u said yours had a raddle to did that go away? ​@@KevinNadeau

[@KevinNadeau]

@@johnnywessinger8899 Yes it did 👍

[@151bradhatt]

I was given an 03 trailblazer with a blown engine. I put a junkyard engine in it (biggest pain in the butt ever!) a year ago. Last summer it overheated really bad and I think that blew the head gasket and warped the head. Went down hill since then. I've had a dozen of the low oil pressure alarms that I thought was related to the head gasket (it was leaking exhaust into the cooling system) but I figured as long as the engine is spinning the oil pump was pumping oil. Well it's had a rod knock for a couple months now and I'm getting ready to put another engine in it. Now that I see that the low oil pressure is a problem with these engines in going to pull the pan off before I put the engine in and make sure there isn't any sludge and the screen is clean. These are great engines but whoever designed them I'd like to punch in the face!

[@KevinNadeau]

I know how you feel, i was cussing the engineers who designed that engine the whole time i was working on it. Great engines though...i have over 275k miles on mine and it still purrs like a kitten.

[@Themadscientist1969]

just drop in a Cummins diesel motor and be done... LOL Trans dapt surely sells something to adapt it...lol or swap a 5.3 gas burner in it?

[@STEVENSMEX]

Great job amigo... Check the water pump and the alternator bearingsfor noise using the car antenna as a sound carrier... I have a 2002 Trailblazer with that oil press switch prob..Solved use Mobil 1 5w30 with Lucas Too...More lubricity and lower proper flow temp during start up cold condition the lucas adds enhanced lubrication and less friction... Muy buena solucion...Gracias

[@batsonelectronics]

I just saw the 69 vette in the background, you gotta get that running. I rebuilt one 25 years ago and loved it. it was a factory drag car and had a sticker on the 4 speed shifter showing 11.5:1 compression ( actually had the heads decked and was 12.5:1 and needed race gas and premium mixed ) I had the headers into factory side pipes as well. Don't wear shorts and hit that pipe after running for an hour, I literally still have a burn scar on the inside of my left leg after 25 years. It looks weird as no hair grows there. Nothing better than removing the t-tops, pulling out the back windows, and cruising at night in the summer. No ac and radio was crap. It ran 11.9 @107 with standard Gatorbacks. It pegged the rev limiter shortly after the 1/8 mile as it was built for the 1/8 mile. I could do a burnout starting in 4th if I revved it to 3000-3500 rpm and popped the kevlar clutch that took a ton to push down. I regret selling that car, I got a new 1994 vette instead but that was one hella car.

[@KevinNadeau]

It's actually a 1970. I inherited if from my dad when he passed away. No AC, no power steering, no power breaks...just power through the 4 speed and 3.70 rear end!

[@batsonelectronics]

Awesome car to have, Sorry to hear how it came to you. I guess driving it is bitter-sweet. Mine was a 350ci, dyno'd slightly under 500HP at the wheels, 5.? rear end from the factory. Apparently Chevy made a drag version and the super low rear end and higher compression were part of it. The guy I got it from put in the Kevlar clutch I think. My top speed was 107 due to the trans and rear end gearing. I loved my newer vettes but that body style with the chrome bumpers is just plain sexy.

[@KevinNadeau]

I'd love to get mine on a dyno some day. I has an LT-1 motor (non-factory) which were supposedly rated around 370 hp. I'll be sure to make a video if/when I get a chance to dyno it.

[@larrylamb3480]

I like the way you got such good video views of oil pressure switch because I know it's in a difficult and not very accessible position ! Thanks for your effort !

[@kimberlybarrs6247]

THANK YOU SO MUCH FOR LETTING US SEE YOU WORK ON THAT MY ENVOY OIL PRESSURE LIGHT HAS BEEN ON FOR SOME TIME NOW THIS MIGHT HELP ME THANKS AGAIN

[@KevinNadeau]

Thanks for watching! Hope you're able to solve your issue.

[@strikeforce2525]

I did not want to take the engine apart or remove the rack n pinion just to get the oil pan to drop on my 2004 Envoy so I could clean the pickup tube. In this Video or the next one Kevin replaces the engine oil with kerosene and this does not work for him maybe he did not leave it in their long enough. I removed the oil and filter in my envoy. Then put a new filter on and replaced the engine oil with 2 Gal of diesel fuel. I let that sit in the engine for 3 days starting the engine once or twice a day for no more than 10 seconds. The now Black diesel was drained and filter removed next added new filter and New Oil and Oil pressure is better than ever.

[@derekwalker569]

@@strikeforce2525 this video has been 3years ago. Did you resolve your issue using the diesel fuel trick? Do you still have your Envoy/Trailblazer?

[@strikeforce2525]

@@derekwalker569 Yes and Yes

[@derekwalker569]

@@strikeforce2525 thanks for your reply. Now did you add the 2 gallon diesel fuel to existing engine oil using new filter ? Or did you add 2 gallon of Diesel to engine alone after you drained existing oil using new filter? And did you pour in through dipstick or through the top oil cap?

[@HLewis-ig9ig]

Great video coverage considering the space you had to work with...

[@KevinNadeau]

👍

[@ILBIS123]

Hi Kevin.This might sound stupid, but after i went trough al the work of repacing the oil pickup tube. (mine is 2wd). The same oil pressure low message came back. After i got pissed i noticed that this contidion ony occur while i was stupped at a traffic light and the car was idling. I noticed some hesitation on the engine and the rpms started getting low and the the dammed lights came on. But if i stpep on the gas a little the ights when off and the oil pressure gauge came back to normal. I was mad, but then my expert mechanic, THE LORD asked me...:Have you changed your air filter an cleaned your throttle bodry?...The answer was...NO. mY ENVOY IS A 2004 WITH ONLY '65K MILES AND OIL CHANGES HAS BEEN performed reigiously...but...I have never changed the AIR FILTER. So i went to Auto Zone bought the filter and trottle body cleaner, did all may homework and gues what??? VOILá! eVERYTHING IS RUNNING smoothly AND THE ENGINE STAYS RUNNING PERFECTLY IN DRIVE WITH THE EMERGEGY BRAKE APPLIED FOR MORE THAN 10 MINUTES. AND NO LOW OIL PRESSURE STOP ENGINE MESSAGES ANYMORE! Thanls God! I hope I can help someone with the same problem. Thanks for your videos an all your work.

[@KevinNadeau]

I'm glad it was an easy fix for you. Thanks for the support!

[@TNCelt1]

Okay...if you try this procedure and then, IF IT DOESN'T FIX THE ISSUE; consider this; you may very well have a clogged oil pickup screen that is towards the bottom of your oil pan, (especially if you did an "engine flush"...and getting the oil pan off is a MAJOR job to get off to reach and clean the pickup tube. This will eventually choke and kill your engine! SO...you can also try this to (as safely as possible) dissolve the sludge that is clogging the pickup tube. How to Unstop an Oil Pump Pickup Tube Without Taking the Oil Pan Off Chances are very good that if the oil pressure has dropped due to a clogged pickup tube screen, the pump is damaged and should be replaced along with new crankshaft bearings as well. There is a procedure, though, that may help if the damage is not too severe. Step 1 Drain the engine oil into a drain pan and remove the oil filter. Replace the drain plug and pour 1 gallon of Berryman B-12 Chemtool or a similar product into the engine oil fill. Do not crank the engine. Let the product sit in the oil pan for 2 days before draining. Step 2 Drain the solvent out of the oil pan. Replace the drain plug and fill the oil pan with solvent once again. Allow it to sit for 2 additional days and drain the product. Inspect it as it flows out of the oil pan. If it is a dark sludge, the process will need to be repeated. Rub the discharge between two fingers and feel for carbon grit. If there is grit present, it will clog the screen. Repeat the process until there is no sludge or carbon grit in the discharge. Step 3 Drain the flush agent one more time making sure it is free of sludge and carbon. Remove the oil fill cap and let the engine sit overnight with no drain plug or oil cap installed. This will allow the engine to air out. Step 4 Install the oil drain plug, a new oil filter and add engine oil. Disconnect the engine computer fuse, or disable the engine so that it will not start. Crank the engine for 15 to 20 second intervals several times, allowing the starter to cool between each crank. This will prime the oil pump so the engine will not have a dry start. Start the engine and pay close attention to the oil pressure. Listen carefully and make sure there are no engine knocks or rattles. If there is noise, the engine requires further repair.

[@levarhudson5244]

i always watch his videos they are great and really helps please up the good work

[@KevinNadeau]

Thank you 👍

[@thomasschuler7432]

YES OMG YES THIS IS EXACTLY WHAT MY ENVOY OIL PRESSURE GAUGE IS DOING AS I SIT HERE LOOKING UP WHAT WOULD CAUSE IT !!!! Thank you so much for your video. Mine is doing this randomly tho. Not constantly.. I’m going to go ahead and replace the switch now. Thank you.

[@strikeforce2525]

I did not want to take the engine apart or remove the rack n pinion just to get the oil pan to drop on my 2004 Envoy so I could clean the pickup tube. In this Video or the next one Kevin replaces the engine oil with kerosene and this does not work for him maybe he did not leave it in their long enough. I removed the oil and filter in my envoy. Then put a new filter on and replaced the engine oil with 2 Gal of diesel fuel. I let that sit in the engine for 3 days starting the engine once or twice a day for no more than 10 seconds. The now Black diesel was drained and filter removed next added new filter and New Oil and Oil pressure is better than ever.

[@Themadscientist1969]

@@strikeforce2525 And not worried about "wiping out" your bearings doing so??? --that concerns me...

[@strikeforce2525]

@@Themadscientist1969 My Oil pressure is fine now for the last 5 months and holding.Diesel is oilier than gas and I only ran the engine for 5 -10 seconds. I was told by a Mechanic that this would not hurt my Engine in any way. You do not have to start the engine but it helps I was told. IF you just want to sock the puckup tube in the Diesel for a few days that might get the job done. BUT hey just trying to help

[@pavilioninternational]

Great video! I thought it was going to take someone else to do for me, but now, I’m doing it myself. Thanks

[@KevinNadeau]

👍👍

[@darrelfuhrman8217]

I have a 2002 Chevy Trailblazer with 312,000 miles on it. Bought it at 105,000 miles. I think that it sounds like an alternator bearing noise. Alternators usually spin 3 to 4 times the crankshaft rpm. Hello from north east Montana. 10 miles from the Canadian border.

[@KevinNadeau]

Wow, that's impressive mileage👍

[@darrelfuhrman8217]

@@KevinNadeau On our last trip to Billings, 320 miles, went down on Sunday, 60 to 75 mph, 22.4 mpg. Came back on Monday night, 65 to 90 mph, 19.4 mpg. Montana daytime 70 mph, nighttime 65 mph, on 2 lanes.

[@joseCalderon1976]

It sounds like your battery is getting a little weak maybe? Yeah, I have to replace that oil sensor too on my 2003 Chevy trailblazer with 195k miles. Good stuff. Subscribed

[@KevinNadeau]

I did replace my battery at the beginning of this year with a Napa Legend battery 👍

[@rruizproductions]

I had same problem. Changed oil pressure switch with no fix. Added STP oil treatment and problem went away. Apparently 5W-30 is too thin. You need a thicker oil if you have high mileage in your vehicle.

[@KevinNadeau]

Good point. I use 10W-30 full synthetic.

[@rruizproductions]

I had just changed my oil to recommended 5w-30 and it continued. After research, a thicker oil was necessary to maintain a normal operating pressure. My quick solution was STP to increase viscosity. Next oil change will be 10w-40 since I live in the hot south. Good luck!

[@jrsanchez800]

Thts true, after so many miles u cant put the oil tht gmc recommnds. Mine has 260xxx altho if i put the recommnded oil in it. It knocks n if i put thicker oil. Solves the problem good luck guys!

[@haywoodbush3110]

thanks for that info... I was watching this along with a few other videos to se how to change the switch. A friend of mine said to change the oil weight. I think that is my first solution as the truck runs and sounds great but after she warms up, drops to 0 when idling and 40 - 44 when driving. I was told to use 10w-40 synthetic... Suggestions?

[@jrsanchez800]

James Shirah I had the same issue. When id start it it was fine til after 30mins drivin. Then the gauge would go nuts n i used to get the "check gauges" light n i replaced the oil switch n solved the problem u will need a 1 1/16 deep socket sticking ur hand thru the lower control arm n frame. Very easy not even 5 mins fix hope it solves ur problem. Good luck!!!

[@letmedicinebethyfood5311]

You would need a way to apply pressure to it and check the switch whether it opens or closes to pass current for the pressure light. It probably closes to send signal to the light

[@batsonelectronics]

it is a pressure switch, put your meter to continuity and the black on 1 pin and the red on the other, it will likely read some ohm number ( likely very low to 0- direct short ), if you used compressed air into the hole at the end ( try 15psi first and go up by 10psi each time ) , the continuity should change likely to above 10ohms or more.( I would imagine more like 1k ohms or greater ) The computer reads an open circuit ( just unplug the connector ) as oil pressure ok, and a short as zero ( or below pass level ) pressure. If you ever get a sensor that dies while driving , just disconnect until you can get it replaced. I just got a Rainier and got the low pressure warning even though everything was fine. I plan on putting in a real oil pressure gauge and disconnecting the factory plug as it decreases power when it thinks oil pressure is low even when it is not.

[@gfysyoutube]

Envoys/Trailblazers almost always have a gunked-up pick-up tube in the oil pan. You have to drop the pan, clean the pick-up, and walla! You have oil pressure again!

[@borizzy1985]

Thanks man doing it now appreciate the tips the electric connection scared me

[@KevinNadeau]

Good luck with your repair.

[@mrandmrs.p3635]

Can it be driven until it gets fixed? Mine is doing the same thing.

[@peaceWorker77]

This is amazing you have it done ✔ very well explained.

[@josephalfonsi8022]

The oil sensors are faulting out cause of dirty oil. The PVC hose can put moisture back into the oil causing the oil to have white spots in it. And in the winter is when it happens the most. Needs a oil catch can in place of the PVC to stop the problem

[@souldoctor10]

I just did this repair on my 2004 Envoy I6. The 1-1/16th socket... does NOT fit. Either the old sensor I removed or the brand new one. It was to big and slipped. I tried my 1” socket and it was to small. I wound up using channel lock pliers on it. It worked but not much space to work with.

[@julianpalmer2410]

having the same issue with my 05 trail blazer i bought yesterday oil pressure kept goin down there seems to be a slight knock also my coolant is boiling is that a bad aighn of bad motor

[@KevinNadeau]

Congrats on your new-to-you truck! Start with the easy things first. Change your oil and pressure switch. How many miles are on your truck? Since you just bought it, i'd suggest going through and changing all the fluids. That way you have a fresh start with the maintenance.

[@julianpalmer2410]

@@KevinNadeau we’ll come to find out the motor is shot I think it threw a rod it’s knocking really bad almost no power I think I got hustled honestly

[@KevinNadeau]

Sorry to hear that, its a terrible feeling.

[@thomasmiller3665]

I have the same problem I changed the oil pressure sensor n I still have the same problem

[@imachristiandad]

Thanks! I have the exact same problem... 225k miles as well.

[@KevinNadeau]

You're welcome. I will caution that my root problem was ultimately a clogged oil pickup tube. Check out my other videos for that.

[@candyhernandez-diaz1937]

@@KevinNadeau hey Kevin my snl flushes when I give it gas did yours do the same

[@candyhernandez-diaz1937]

Sel

[@KevinNadeau]

No it didnt.

[@strikeforce2525]

I did not want to take the engine apart or remove the rack n pinion just to get the oil pan to drop on my 2004 Envoy so I could clean the pickup tube. In this Video or the next one Kevin replaces the engine oil with kerosene and this does not work for him maybe he did not leave it in their long enough. I removed the oil and filter in my envoy. Then put a new filter on and replaced the engine oil with 2 Gal of diesel fuel. I let that sit in the engine for 3 days starting the engine once or twice a day for no more than 10 seconds. The now Black diesel was drained and filter removed next added new filter and New Oil and Oil pressure is better than ever.

[@garyburbank3537]

Awesome video we have a 06 GMC Envoy XL

[@KevinNadeau]

Thank you 👊

[@shawnwithee3187]

I didn't take the wheel off I just jacked up my 03 envoy reached up with the oil socket and 3.8 ths ratchet and it came right off.

[@frankdatank2529]

Good video keep it up helping the world one person at a time . GOD BLESS YOU AND O'REILLY'S

[@KevinNadeau]

Thank you!

[@davem5308]

March 2,2020. I have the same issue with the fluctuating oil pressure needle. Thanks for the video, now I know what I am up against. I replaced bearings due to speed sensors, when I bought my 04 used, last year. All good on that front. Anyone know about vibration through the steering column when at a stop? I had to replace an ignition coil a month ago. Done at a garage,and it was more than I wanted to pay, near,$300.00. Was a Florida vehicle for college student, but it came home to NH, and I grabbed it. I like the Envoys.

[@KevinNadeau]

Good luck with your truck!

[@shawnpatrick5452]

Damn $300 for a coil they screwed you I could change all of the coils for half that money and about 30 minutes worth of work and that's including sitting down smoking a cigarette or two

[@slomotion5165]

It's probably the a/c compressor, that's what caused mine, the vibration

[@giaellington1276]

Thank you Sir!

[@KevinNadeau]

👍

[@jonathanalatorre7429]

Hello, I Have a question, so I have changed my engine oil and it still says "check gages," , I'm thinking that it will be the oil pressure switch. My question is, do I need to change the engine oil again. I changed the engine oil since a week ago.

[@KevinNadeau]

I probably wouldn't change it again.

[@tankdog03ify]

Did this fix your issues? I recently bought my son an 07 4.2l with 130k and it today had the low oil pressure, stop engine command.. I changed the oil and filter, happens again.. it does have a small power steering fluid leak which is right above this sensor, and it has a new minor oil leak coming from this same area.. im preying its this oil pressure switch, I definitely need a simple easy fix like this.. great video

[@tankdog03ify]

Forgot to mention I also have a 05 4.2l with 345k miles on it, still runs decent.. my son actually drove that for about 4k before I decided to but another one, I have literally changed everything on my old 05. I now drive my 06 silverado crew cab fully loaded.. I loved my trailblazer so much I had to get him one.. I just needed a full size truck for work otherwise I'd be driving another suv for sure

[@KevinNadeau]

Ultimately my problem was a clogged pickup tube. You can check out those videos on my channel too.

[@peaceWorker77]

Thank you very much so helpful for me.

[@ktmeman]

So you don't need to do the oil and filter change before changing the pressure sensor? My 2004 chevy trailblazer has the same problem

[@KevinNadeau]

It's probably not a bad idea to do an oil/filter change too

[@dinoteolis191]

does this happen on the 5.3L v8 also

[@KevinNadeau]

I'm not very familiar with the 5.3L, but you certainly could have low oil pressure issues with that motor, or any motor for that matter. If I'm not mistaken, the oil pressure gauge on the 5.3L motors reads the actual pressure, not a dummy light like the 4.2L.

[@yesiram8]

Reasonably informative but I just ate half a pizza and the camera work is making me want to hurl! 🤢 LOL

[@KevinNadeau]

Thanks. My camera work has improved since then (at least I think so 😀). That’s a lot of pizza 😀

[@opticacruz7770]

le hice lo mismo pero las molestias siguen ¿Qué otra idea me puedes dar ?

[@jayvette75]

Great video BUT too bad he did not do what I did , I bought it on ebay 6.99 OEM and it took me about 10 min to remove and install .

[@ainstaink8312]

So the pressure switch is typically shorted or closed, you can use the multimeter to test for continuity. It should read 0 ohms. Once the pressure goes above about 10psi, it opens up. But I think your problem was that the switch was internally damaged and leaked oil. Also those vehicles have issues with front wheen bearings...typical problem.

[@KevinNadeau]

The problem ended up being a clogged pickup tube. I know what you mean about the wheel bearings. I've had to change them a couple times.

[@ainstaink8312]

@@KevinNadeau I am glad it was just the pickup tube! Better than excessive clearance at the cam or crank bearings.

[@flyingBrian115]

Another tip go to your local hardware store by some Teflon tape to put around the threads that will help Sealing as well

[@darrelfuhrman8217]

DO NOT put Teflon tape on an electric sensor, the Teflon tape may insulate the sensor causing faulty reading. No need for Teflon tape or thread sealer paste, that o-ring will seal great. My uncle installed a brand new GM Target Master motor in his pickup, he wanted me to check out why it ran with so low of oil pressure, why it felt hot, but gauge said that it was cool. The gauges worked properly on the old engine! Jim wanted me to start by mechanical checking the oil pressure. It was perfect. Had me put in a new oil pressure sensor, it showed about 1/2 of what we thought that it should have been. I got rid of all the Teflon tape on the tee to the block, the 45° elbow, the sensor, the choke oil switch. That cleared up the oil gauge problems and that damn choke that doesn’t work problem! I cleaned off the temperature sensor, solved the temperature gauge problem. Sometimes Teflon tape will insulate a sensor, causing other issues! Hello from north east Montana. 10 miles from the Canadian border.

[@bryanbrown4908]

That noise is your ac compressor. Mine is doing the same thing

[@iyaddarwish5205]

Very helpful as always, thanks dude

[@eddielee6313]

I hade same problem it was my water pump an idler pulley take off fan belt an try wiggling fan it won't leak water, pump is spring loaded seal.

[@wesleybillionairevirgin8714]

Yea because my oil light came on but I'm full off my mechanic told me that I didn't have no oil pressure he said that replacing the sensor that could solve it

[@KevinNadeau]

He needs to put a mechanical gauge on it to check the actual pressure. Check out my other videos for that.

[@strikeforce2525]

I did not want to take the engine apart or remove the rack n pinion just to get the oil pan to drop on my 2004 Envoy so I could clean the pickup tube. In this Video or the next one Kevin replaces the engine oil with kerosene and this does not work for him maybe he did not leave it in their long enough. I removed the oil and filter in my envoy. Then put a new filter on and replaced the engine oil with 2 Gal of diesel fuel. I let that sit in the engine for 3 days starting the engine once or twice a day for no more than 10 seconds. The now Black diesel was drained and filter removed next added new filter and New Oil and Oil pressure is better than ever.

[@leoramirez1499]

And if the sensor is already replaced the truck was running great but once again the oil goes to 0 ?

[@KevinNadeau]

Yup, it was in fact a clogged pickup tube

[@davidcardoza8790]

I'm curious to if the knock went away!?

[@KevinNadeau]

No more knock👍

[@davidcardoza8790]

Ok appreciate it. Picked up a 2003 then this happened. Sounds horrible. I was hoping it wasn't junk. A simple repair like this could keep it from the junkyard

[@strikeforce2525]

I did not want to take the engine apart or remove the rack n pinion just to get the oil pan to drop on my 2004 Envoy so I could clean the pickup tube. In this Video or the next one Kevin replaces the engine oil with kerosene and this does not work for him maybe he did not leave it in their long enough. I removed the oil and filter in my envoy. Then put a new filter on and replaced the engine oil with 2 Gal of diesel fuel. I let that sit in the engine for 3 days starting the engine once or twice a day for no more than 10 seconds. The now Black diesel was drained and filter removed next added new filter and New Oil and Oil pressure is better than ever.

[@zaid3ssaf1]

What would happen if you run the engine for more than 10 seconds? Are you worried about the diesel igniting, or the engine running with no oil?

[@strikeforce2525]

@@zaid3ssaf1 I just wanted to circulate the diesel with out hurting the engine so I did not want it to get hot.Although I have been told that diesel is more oily than gas and it should not damage the engine. i guess I never thought about a fire hazard because I just let it run for few seconds to splash it into the engine and through the pickup valve.

[@redreno7211]

Weird. I’m watching this 2 years to the date of the making.

[@gulzarzeb]

awesome bro fro 🇸🇦

[@RustyShacklefardd]

I had the same p0014 code on my 05 trailblazer I just replaced the cam position sensor. I need to do the oil sensor

[@frankdatank2529]

Let me finish watching before I comment lol.

[@mundoplano1007]

Thank u

[@KevinNadeau]

👍

[@al57944]

Did it fix the problem?

[@KevinNadeau]

Not for me. My problem ended up being a clogged pickup tube. I have a few videos about on my channel.

[@carlosncali06]

I have the same car and it's due for an oil change ,should I change the oil before or after I change the switch? Thanx

[@KevinNadeau]

It would be a little easier to change the switch with the oil filter out. So for that reason I would go ahead and change the switch while you're doing an oil change.

[@xXxCrazyJay810xXx]

I like your (Ford) LMAO

[@KevinNadeau]

🤣🤣

[@payasito8132]

Hey did your car turn off and say low oil pressure?

[@KevinNadeau]

It didn't turn off, but I did get a warning saying "low oil pressure, turn engine off"

[@payasito8132]

@@KevinNadeau ok i was wondering cause at the light thebtrailblazer shot off cause of low oil pressure ima buy the oil sensor tomarrow

[@KevinNadeau]

@@payasito8132 Hope that solves your problem. If you watch some of my later videos I show that the root cause of my low oil pressure was a clogged pickup tube.

[@payasito8132]

@@KevinNadeau ok thanksbi will watch them

[@strikeforce2525]

I did not want to take the engine apart or remove the rack n pinion just to get the oil pan to drop on my 2004 Envoy so I could clean the pickup tube. In this Video or the next one Kevin replaces the engine oil with kerosene and this does not work for him maybe he did not leave it in their long enough. I removed the oil and filter in my envoy. Then put a new filter on and replaced the engine oil with 2 Gal of diesel fuel. I let that sit in the engine for 3 days starting the engine once or twice a day for no more than 10 seconds. The now Black diesel was drained and filter removed next added new filter and New Oil and Oil pressure is better than ever.

[@paquesepas6696]

I have an 02 trailblazer 4.2l and my question is about the 2 wire circuit connector that runs to this oil pressure switch. If I wanted to the wiring at the connector what am I looking for? Like is it a ground and a positive or a ground and control? My wiring is very oily and I want to make sure it's not that before I replace the switch. Thanks.

[@KevinNadeau]

The shop manual says to test the circuit signal for a short to ground.

[@paquesepas6696]

@@KevinNadeau How do I do that with my multimeter? I know one wire is called low ref which is the ground, and is the other one like a 5v signal and do I test with the car on?

[@paquesepas6696]

@@KevinNadeau wanted to update you since I figured out from scannerdanner how to test for a short to ground and found that my wiring was good. I did see oil in the harness so I cleaned it up and replaced the oil pressure sensor and have had zero problems so far after 500 miles.

[@KevinNadeau]

@@paquesepas6696 Awesome. Glad to hear that worked for you.

[@dealerauctionnightmare4689]

Do you have any idea how close the pickup tube is relative to the oil drain plug?

[@KevinNadeau]

I don't remember exactly. Looking back, I wish I would have taken some measurements. If I had to guess, I'd say about 4-6 inches rear of the drain plug.

[@dealerauctionnightmare4689]

@@KevinNadeau thank you! I was wondering if I could stick a small brush through the drain hole and clean it some. Doesn't seem possible if it's that far off, that's why I asked. I'm going to fill the pan with some carb cleaner and let it sit for a few days and see what happens. Thanks again for the reply.

[@martonwright2974]

Water pump my trailblazer did the same thing

[@wesleybillionairevirgin8714]

Yeap after reading up on it my car running rich the whole time due to a dirty air filter does that half to do with anything

[@KevinNadeau]

A dirty air filter probably doesn't have anything to do with low oil pressure.

[@blessedthelord]

Hey Kevin I messaged you about a year ago concerning my GMC Envoy. Same issue. Did you try using synthetic oil before replacing oil pick up tube? If so, did it help?

[@KevinNadeau]

Yes, I've used either full synthetic or synthetic blend oil for the past several years. That did not seem to make a difference.

[@blessedthelord]

Have you learned of anything that could help clear up oil pick up tube. I see you tried kerosene. I also tried motor flush. I am trying to find an easier alternative. Any suggestions?

[@KevinNadeau]

Someone else suggested pouring some parts cleaner in through the dipstick tube. First drain the oil, the put in just enough parts cleaner to cover the pickup tube. You'll have to estimate how much cleaner to use, but I would guess maybe 2-3 quarts.

[@blessedthelord]

Kevin Nadeau Thanks . I didn’t even think about that. I guess I would have to remember not to crank up engine. Lol. Thanks again . I will try the parts cleaner idea. How long should I leave parts cleaner in?

[@KevinNadeau]

@@blessedthelord I'd probably let it soak for a few hours. Then drain, fill with oil, and do another oil change after a few hundred miles. Good luck! Let me know how it works for you.

[@dontaejarell]

Oil pressure sensor switch

[@ILBIS123]

ATTENTION FRIENDS! Is a GM defect on the oil pump pressure relieve valve plunger that gets stucked. They should make a RECALL of all vehicles that have this problem, It is very costly to replace the oil pump for something so small and simple. Envoys, Bravadas, Trailblazers and a lot of other vehicles. There should be a Class Action against GM for this. The problem is that when the valve is defective the computer incorrectly senses Low Pressure. That’s why when you step on the gas, the low pressure message disappears! In other words…is just a momentarily lie from the valve that makes the computer think that It has no oil and your car stalls trying to protect itself. This is how I solve it “momentarily” after I did all this… 1. Changed the oil sensor. 2. Flush the engine with Kerosene 3. Replaced the engine pickup tube. 4. Clean the throttle body (was dirty) After all that I was about to give up and sell my Envoy, but I finally found a video where it was explaining the oil pressure relieve valve defect What I did, was to change my engine oil to 40W and use LUCAS oil treatment And Voila! The engine oil pressure went up and the low pressure message has disappeared. (up to now..knock on wood). I wish you all luck. kzbin.info/www/bejne/f52Yd5KHm616jJY

[@3434abab]

replacing the oil pick up tube is too much work tho

[@hannahwolfram7714]

Unsure you will see this because this was so long ago but did that work long term? Did you end up having to replace the oil pump and was it safe to drive as is?

[@williamheatley2968]

The noise is the Alternater bearing

[@KevinNadeau]

I made this video about 3 years ago and actually still have the same alternator 👍

[@davidcardoza8790]

@@KevinNadeau did your part replacement take that knock away!?

[@KevinNadeau]

@@davidcardoza8790 My problem was ultimately a clogged pickup tube. I've got a few videos about it on my channel.

[@dealerauctionnightmare4689]

It sucks that GM put a fake oil pressure gauge on these vehicles to fool us into believing it has pressure when it doesn't or vise versa.

[@darkforceofone]

Did you ever figure out that bearing noise?

[@KevinNadeau]

Brad R. I believe so. I just finished cleaning the oil pickup tube, which was about 90% clogged. Now the noise has gone away. So I believe the noise was related to low oil pressure, which I solved by cleaning the pickup tube screen.

[@Uhhhh972]

Noise sounds like power steering pump. Mine had clogged power steering cooler which caused the starved pump. Sounded same before I replaced the lines and cooler

[@kraz904]

If there’s oil in the connector, the switch is bad. No testing required…

[@STEVENSMEX]

OIL PICK UP TUBE IS ALSO A PROB WITH THE 5.3 CHEV ENGINES... QUICK FIX

[@KevinNadeau]

That was the problem on my 4.2l engine. It was about 90% clogged. But not an easy fix since on these engines.

[@STEVENSMEX]

The screen can easily get clogged...use the mobil 1 my friend it is expensive buuuut worth it...

[@josephalfonsi8022]

When making information videos don't talk so much about unnecessary stuff just get to the point thanks for the info

[@johnlocker9424]

That noise in front sounds like your Water Pump, (Coolant Pump)

[@gulzarzeb]

i m sure if someone will go to mechanic he will go to replace the oil pressure pump

[@keithbender5759]

to hell with the oil pressure switch lets see that camero

[@KevinNadeau]

I'm offended! Haha. I think you mean Corvette. Here's a start up I did kzbin.info/www/bejne/j4m8e3SjaqqAi9U

[@keithbender5759]

Yes I saw at the end. Saw the wrinkle wall tire and some fender thought it was a camera was close

[@fishgutsone]

Sounds like your water pump is bad, grab the fan to see if it wobbles, I just replaced mine.

[@KevinNadeau]

Turned out to be a clogged pickup tube screen that was starving the oil pump.

[@frankdatank2529]

Just being honest at 6:12 of the video ur doing a video of nevermind.

[@spoonfullpros]

Is it necessary to take off the wheel

[@KevinNadeau]

Probably not, but would make the job easier I think.

[@janayjones6795]

I need you to come fix my gmc😂

[@KevinNadeau]

janay jones What seems to be wrong with it?

[@janayjones6795]

Kevin Nadeau oil pressure light came on and went to zero. I turned the car off. Now the battery is dead. I got a jump and everything thing worked fine. Woke up this morning and the battery is dead.🙃

[@KevinNadeau]

janay jones Those could be two separate issues, just happening to show up at the same time. If battery is over about 4 years, have it tested. Oil pressure could be the pressure switch, oil pickup tube, or something else in the engine.

[@thetruckernelsonchannel5274]

Subscribing!!! Thank you!!!

[@KevinNadeau]

Thanks for the support!

[@wesleybillionairevirgin8714]

That's all that was wrong

[@KevinNadeau]

Awesome!

[@RustyShacklefardd]

steering pump

[@haszkibler830]

Smh next video stop running your mouth and get to it we didn’t come here to know about your whether

[@Chilling4Shillings]

*weather

[@johnjesus971]

BWD! Broken When Delivered

[@LuisRamos-ch3bw]

La bla,zer

[@ehernandez1917]

Jesus too much bla bla bla man just go straight to the point zzz

[@nadedemon]

envoys are garbage i hope you never have to put a power steering pump in yours

[@builtbluecollar1687]

:-) I have a it's no fun.

[@shawnpatrick5452]

A power steering pump on a trailvoy 4.2L is easy as hell and i can do it in like 30 minutes with a blindfold on I honestly don't know how you think it's hard to change. How are they garbage all of them with the 4.2 run great the 5.3 on the other hand are junk I don't know why anybody want a 5.3 instead of a 4.2 two more cylinders for 25 more horsepower and a lot shittier fuel mileage. Doesn't sound like a very good trade-off to me

[@peaceWorker77]

Thank you very much so helpful for me.

[@frankdatank2529]

Let me finish watching before I comment lol.