Chevy Silverado With A Very Extended Crank - Other Shop Gave Up

In this video I have a look at a ladies 2006 Chevy 2500HD with the Big 6.0 in it and she has an issue with extended crank. She had it at another shop and they threw a few parts at but none of them stuck. Now it's my turn to see what the heck is going on.
-Enjoy!
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Disclaimer:
Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained.

[@robstickland6133]

I worked in the technical departments of two car manufacturers as a troubleshooter diagnostic tech and I can tell everybody watching here that this guy has great process to find faults! Firstly, he takes great care to look up CORRECT information for the exact model, and then takes time to understand how the system works and what the “fail” parameters are. These are the fundamentals that everyone should use. Also, using good equipment relevant to the component and possible issues as well as his EYES……… Fantastic, informative stuff, I commend him.

[@jwitt513]

Yeah, I think the mechanics from the other shops don't try to understand how the system works.

[@simonsackett]

I've learned so much from him, and all for free!

[@Mike_Regan]

A whole bunch of experience doesn't hurt.

[@harrylister804]

Eric O. gets lots of well deserved praise for great diagnostic methodology. His videos explain his reasoning, but it's helpful to spell it out like you did. It's why I read comments.

[@LibertyOrD___h]

ALL DATA is worth every penny

[@jgreitz]

Never a stupid video! Very informative. Something so miniscule as 1/16" of rust can make such a huge difference. Thank you.

[@letthechipsfly7620]

True with abs sensors as well.

[@digi3218]

Yeah that's first thing I thought of.. the wheel speed sensors​@@letthechipsfly7620

[@RB-qq1ky]

@@jgreitz Yes! absolutely. I read in one of the tech publications about a Nissan, where the ‘cage’ around a Hall Effect crank sensor had been discarded in the course of an engine rebuild. The missing cage distorted the magnetic field around the sensor enough to cause a crank-no start concern

[@drunkingsailor2359]

So long as your unit didn't get rust jacked on that rusty ole Chevrolet.

[@tatertots-n-soup]

Oh it was more than a 1/16 in. Just all he had left to show you has the main piece of scaling(oxygen+poullen+dust in the atmosphere oxided on the surface and corroding into it) left from most of it crumbling away. I'm certain most of it poofed into red dust

[@charlesbeaumont1675]

Not every one is aware of the possibility of "rust jacking" Thank you for the video

[@alex10294]

Wheel speed sensor goes bad and is still bad after you put in a new one? It's high on the list.

[@peterhodgkins6985]

NOT a stupid video by any stretch. Damned good 'evidence-based' troubleshooting!

[@ekop1778]

21.11 NO ENGINE HUMPING ON KZbin ,JUST KIDDN

[@onejohn2.26.]

This was not a dumb video, this was a very good video, because who would think about the clearance on the sensor?

[@dss8345]

Wheel speed sensors are another case where improper clearance can cause all kinds of issues.

[@D2O2]

Anyone who has worked with hall effect sensors knows this is a common issue.

[@ferrumignis]

@@D2O2VR sensors are also sensitive to air gap.

[@riverflyswatter]

Dodge Dakota had a shim kit for the 2000 4.7L cam sensor. The kit is not available you’ll have to make your own. .010 or .022 , .033 , .047 just pick one. If you’re wrong you’ll start throwing injector codes p204-209 Good luck

[@D2O2]

@@ferrumignis Even more so

[@suzylarry1]

when scraping crust , could you put a air hose in the hole/socket for the sensor thus blowing all the crust out at the tec's face ! Good find the crust !! Now put that little crusty on a piece of tape and stick it on the invoice !

[@helgew9008]

That hole goes right into the inside of the engine, doesn't it? That's why is has an O-ring on it.

[@johnmcdonough955]

If the sensor is mounted vertically from the top or the rust jacking is so extraordonary or in such a position relative to old plastic as to make rust removal awkward; can positive air pressure be applied or would a carefully applied wad be the go to to avoid engine ingestion of larger rust flakes? There a point where the tech must risk the plastic to gain access? Hard to gauge on an old rusty car I suppose.

[@grimreaper3620]

Chevy Thunder 💥⚡️💥⚡️

[@sartainja]

You got to take a shot of Wild Turkey Bourbon when Eric says “Chevy Thunder”. “Gobble, Gobble!”

[@alveus8205]

This video has everything. Gulf hat, lawnmower guy, squeaky stool, bad wires. Only halfway through and waiting for Mrs. O to make an appearance.

[@deplorablelibertarian]

I'm convinced that the lawnmower guy waits for Eric to start filming, and then runs to his riding mower. It's intentional.

[@aaronreihl39]

Just need the air compressor & furnace kicking on, and the phone a ringin

[@MrMebigfatguy]

i was hoping she'd sneak in and honk the horn.

[@kmtischer]

Don't forget the "Hook in the Ding Dong"

[@thermalreboot]

Nah, too much missing, where's the Fluid Film and the BrakeKleen sound effect? No cat scan either.

[@better_than_nothing]

This was not a dumb video. This is a masterclass in what separates a good mechanic from a great mechanic. It was well worth the 30 minutes. I would have never guessed that rust jacking would create a large enough air gap for it to malfunction the cam sensor. Great job and thanks for the lesson.

[@sartainja]

Eric => The 🐐of rust repair mechanics on GM trucks. Amen!

[@rickblanchette]

I was screaming " Luna Wants In " and you couldn't hear me. Now I know what to look for on my 2500HD if it ever happens. Great job.

[@hightechcarpentry]

These are AWESOME trucks. My 2004 2500HD never lets me down; towing, plowing, hauling tools and equipment. I've owned several of them and found they're very consistent. When an issue comes up, I've usually fixed it before or it's at least well documented online so I know right where to look.

[@littleshopintheshed]

Reluctor wheel to the cam sensor: “Can you hear me now? How bout now?”

[@darrylr]

Exactly, the "woop-de-woop"

[@mrbill8542]

The master wire whisperer does it again !!! Saving folks money left and right !! NICE !!

[@DK-lq8nj]

definitely NOT a dumb video! Every time I watch, I learn, re-learn, re-see, re-impress upon my brain the things I forget. If you want to call them dumb videos, then please keep making dumb videos because they all help us dumb guys. ... if all that rambling makes any sense... Keep up the good work!!

[@mh70ss]

Makes you wonder whether the original cam sensor was actually bad to begin with, since you have never replaced one? Guess we will never know. But I'm sure Ivan is giving you a thumbs up!

[@jamespeterson686]

This is the difference between a real technician and a parts changer. Great video! Thanks

[@rider547]

This was NOT a dumb video. As usual it shows how a proper method of troubleshooting will always lead you to the root cause of the problem. Excellent work! 👍🏻

[@georgeatech1965]

I don't care how much you much you belittle your skills, you are a genius. Okay, you don't like that word...you are very, very good at your job.

[@bearg4019]

The first time in my life I've seen rust keep a vehicle from starting....in 50 years I've never seen this...COMMON SENSE WINS AGAIN 🏆 👏

[@carolriley9392]

Its so refreshing to see someone that actually believes in troubleshooting ! 9 out of 10 times, it's never the pcm, but instead all the sensors and connections going to the pcm.

[@jeffjankiewicz5100]

There's your problem Lady! A rust jacked sensor! That was quite a thick chunk of rust. That lady may get one more season out of that rust bucket. Btw, I'm a Chevy guy. Nice fix.

[@thefast100]

Impossible to make a dumb SMA video! Sharing your thought process on troubleshooting anything is gold. Thank you!

[@renaldonormani6646]

I can’t believe how happy I am watching you diagnose and never giving up Eric. And here is another example of your brilliance. Thanks so much man!

[@erice9536]

I have an 04 like that with no rust and 285K, came from the desert. Always going to school at the south main academy.

[@JeRKII]

You keep referring to this as a stupid video but in all honesty this is a huge win mostly for the customer but WOW !!! i wouldn't have thought about this and obviously neither did the other shop.. HUGH win all the way around. Thank you sir

[@Bobbywolf64]

For sure. Lots of other folks, and shops would have thrown another new cam sensor at it. Likely a more expensive GM sensor, and the problem would have remained. If the sensor was in the front, most would have picked up on the rust jacking, but back there, you were going on experience looking for that. It was a great fix.

[@dennisharr163]

This was honestly a great video. The common fella would have never figured out a 1/16" piece of rust was the culprit. You are the wizard sir.

[@12lovenos12]

Love the videos. As a mobile mechanic - I listen to Eric in the background nearly daily- the bits stick in my brain…saved my bacon more than once

[@janetcoursey6756]

There are no dumb video! They all offer information on the process! Without that it’s easy to miss the problem just like the other shop did! As always I think you Rock!

[@jimandnena4]

It can never be a dumb video if no one can fix it and it ends up at your shop, and gets fixed. Thanks for the video.

[@littleshopintheshed]

Thank you for all your videos. Can’t even begin to tell you how awesome you are, and how reading schematics is a huge help that I have always overlooked until watching your channel. Thank you.

[@athletikonaol]

That was so good I could almost hear the chevy song playing at the end...

[@JeffWinter1]

Was that "Like a rust...🎶"?😂

[@techdude2000]

As usual, great detective work. None of your vids are boring or useless. This was another learning experience for those that live in the rust belt and an eye opener for those that don’t.

[@kellygiddens3356]

I Repaired one of these that the harness on the driver's side got to close to the exhaust manifold and had melted all the wires together. Went to the junkyard and got that harness and rerouted it away from the manifold, all was good.

[@tom5cox]

Enjoyed watching you do the repair ‘blind’. Years ago as a young mechanic I watched an old timer replace a water pump completely blind. I was in awe. Watching you, I still am…

[@hightechcarpentry]

Some of the most reliable and consistent trucks ever built. My 2004 2500HD is still a beast towing, plowing, hauling, and never lets me down. I tell everyone I'm driving it until the wheels fall off, then I'm going to put them back on and put another 250k on it.

[@AxlesGarage]

I ran into a similar problem with a 2005 Chevrolet 5.3. It had an extended crank however if you immediately stopped cranking and cranked again it would start on the second attempt. Apparently it would flip-flop 180° as a default in the PCM based on a bad cam signal. The cam sensor was new aftermarket then replaced with a new OEM same problem however no rust jacking. Several months of research as a backyard mechanic gave me no results. I came across an old obscure Chevy forum post where someone spoke about this problem specifically it was the only reference to this problem I could find anywhere on the Google tubes. As it turns out sometime after 2006 when GM’s switched past the GMT 800 series GM redesigned the cam sensor and the aftermarket followed suit. The redesign of the cam sensor works in the later models post GMT 800 Lt style engines however they have issues when used in the older vehicles. I sourced an old OE cam sensor from a junkyard problem solved. GM tried to consolidate their parts line and the aftermarket followed and now good cam sensors are not available for the early models. U pull it for the win. I did a video on it explaining in detail on my KZbin channel axles garage.

[@TremaineLea]

Not a dumb video at all. I'm no auto surgeon, but this makes me glad I've been meticulously removing rust etc at every step. I may not know if it's strictly necessary, but I'm pretty confident the rust isn't helping anything 😂

[@tonygristina4860]

I'm here for the classic Gulf cap.

[@glenjamindle]

The Jeep hat was the classic.

[@c.e.anderson558]

With the needle in the brim. .

[@RB-qq1ky]

@@c.e.anderson558 * ‘T’ pin 👍

[@scottzehrung4829]

My grandpa retired from Gulf, he was a WWII B-17 Pilot and quite the man. Miss you Bish.

[@mazzg1966]

Hey there Eric, loved the "just saw a squirrel" comment...one of my favorites to use! Thanks for the education!

[@MBoyer-ng6ok]

Rust never sleep... and with NY plow trucks, the rust drinks Red Bull and chain smokes till it corrodes every line and connector... Then it is time to visit South Main.

[@sartainja]

If not for General Motors vehicles and rust, Eric would be out of business.

[@jamespfitz]

Mmmm, Red Bulls and Camels. Let's go to the zoo!

[@charlestrolingersr.3257]

You are the man it takes you 10 min to fix it and shop takes 4 hrs still broke you are the man

[@jamesricc5650]

Always informative. Same principle as when the ABS sensors get rust underneath. Most are going after the sensor and not the corrosion. That’s why you’re the best!

[@kn4cc755]

And the process of changing the sensor clears the buildup of rust and then the new sensor seats properly so, yeah it's fixed but the new part was never required.

[@richardcranium5839]

i was looking at my sensor on my 2000 f150 2wd. it can rust jack till the cows come home but because of the design it will never fail because of it.

[@jhonditch4269]

extended crank was a feature to have oil get to correct places just like pre filling an oil filter.

[@deplorablelibertarian]

This dude is an absolute master at diagnostics... definitely better than ANY 'master tech' at ANY stealership.

[@garysgarage3669]

You have never made a crapy or dumb video. I've enjoyed and learned something on every video you have ever made.

[@chrisforker7487]

Great work sticking with the plan! Your “stupid”videos are way better than most other YT videos out there!

[@greasee.monkey7224]

What you have here is your classic Eric O electrical diag video. And after 30 years of repairing vehicles, I still learn something. Thanks for the education Eric!👍👍

[@rowlandpichey6602]

For mechanics down south who don't deal with salt and rust, videos like this are an eye opener!!! Great Video!!

[@danielj.schneider5162]

Not a dumb video at all, Eric! This is what we come for!

[@akshonclip]

The ECM senses current flow through the 12v power wire to the cam sensor in order to inhibit the fuel pump relay. The test light was mimicking a load so it turned on the fuel pump. This is why the cam sensor is powered from the computer. Its a fuel pump safety item. DOT requires all vehicles to shut down the fuel pump when the engine is not running regardless of ignition key position.

[@stephenshaw67]

Thanks for clearing this question up!

[@floorpizza8074]

Great information, thanks for sharing. The amount of knowledge you guys have just blows me away.

[@ThunderbirdRocket]

Thanks

[@RB-qq1ky]

@@akshonclip I’ve seen it done in quite a neat way back in the pre-electronic & carburettor era using a changeover relay operated by the oil pressure switch swapping the supply to the fuel pump from the crank circuit to the ignition circuit.

[@dddevildogg]

@@RB-qq1ky Honda was one place they did that well into the 90's.Bad solder joint on the pcb of the fuel pump relay way way under the dash Easy fix,once you know it.Car could run for months then act up no-start

[@reedjarvis3824]

You’re the Best!!! What more can I say. Your simple approach and your understanding of trouble shooting are second to none! Great video!

[@philipgavin6962]

I have never watched a dumb video on this channel. They have all been fantastic. Help me out immensely. Much thanks to Mr. O.

[@billloomis3907]

Not a dumb video at all. Good find by an experienced mechanic.

[@DanMestayer]

Not a "Stupid Video". This is a fine example of proper troubleshooting. Thank you Mr. O for your wisdom.

[@jerrymccullough688]

Not a dumb video. You fixed it. Other shop couldn't. Brilliant! Great work, Eric!

[@richard.d5121]

that was a good call, i would have diffentitly missed that one. great video Mr.O

[@pirategmunger]

Definitely not a dumb video, sometimes the actual issue is the absolute last thing you could think it would be. Seen lots of strange issues over the years, especially on heavily rusted vehicles. Im from Minnesota originally so i have personally seen a lot with rust issues. Thanks for the great content as always, this is my favorite YT channel 💪😄

[@puffthepimp]

Eric, this is an awesome video. Never forget the basics/experience.

[@thomasbeck5228]

Thank you for helping us every day people . Learn about our vehicles

[@stu8575]

Said the rust jacked cam sensor - "Me crank you long time" 😉

[@richardcranium5839]

and yes she read that with squinted eyes lol joe

[@davethomas6691]

Hi Eric, Great Video. please dont call these videos dumb videos. As a retired tech theses videos show the difference between "Fitters" and real Automotive tech's and how easy it is to miss the simplest things and have to send work on to someone else. Keep it up. Keeps a retired guy happy.

[@RJJ6129]

It’s not a dumb video when you learn something new, good find Eric! Similar to an ABS sensor on front bearing hub where the rust lifts the sensor and change’s the air gap.

[@Cee-lo69]

No parts needed are always a GREAT video,the customer gets to save money, and the viewers have a chance to learn something.

[@haywardsautomotive6156]

Sometimes you have to start from scratch & not let what other shop's have done change how you diagnose. You just went off the data and looked at the possibilities and found the problem. Great video and how sound diagnostics will inevitably lead to the problem. Definitely not a stupid video & will help others in the rust belts look for rust jacking on sensors that increase the gaps and make them intermittent or inoperable.

[@davidmcclain5180]

First, Luna was trying to get into the office for a long time but no one let her in. She gave up and walked off. Second, it was a great video and nothing stupid about it. Thank you.

[@jeromestrong5614]

Never a stupid video. A lot of info gained .. Thanks for the ride along . Now know to pay attention to items like this. Thanks Mr. O.

[@tiredted33]

A tip for cleaning around a hole like this on a cam sensor, or a wheel speed sensor. Put some silicone grease down in the hole, that way you can get your whizz wheel or cleaning tool of choice right up on it with no worry about dropping rust down in the hole. Gotta love a rust bucket plow truck. Thanks for the video Eric!

[@sometimesleela5947]

Also handy to have a set of rubber stoppers around. Hardware stores have them individually or you can get sets from the usual online suspects.

[@richardthomas1743]

I had a 2006 Chevy Impala with the 3.9L V6 . It had a problem with long crank. The problem ended up being rust on the block under the crank sensor. Good job getting that repair Eric!

[@claytonolive5416]

Just because it seems simple to people who know it clearly is not simple to the parts changers out there keep it up my guy ❤

[@konstantinusstoyanov9749]

Your vocal step by step is very appreciated thank you

[@Mr.Yamahawg]

These types of repairs really suck as the customer often don't understand what has actually happened. You done your job correctly as always, so no blame or fault by you. Carry on, my good man.

[@strokermaverick]

Great job, Eric! Can't believe mechanics in the salt belt, don't pay attention to swelled up flaky rust. The gap has got be correct.

[@andrecampbell691]

I'm not too surprised. Dealerships will just throw parts at a car.

[@strokermaverick]

@@andrecampbell691 I, hear you. Money!

[@avenger1888]

Good job, Eric O. Yet again, you go the extra mile to find the issue with the vehicle. Not many garages these days do that. You are an awesome mechanic even though you claim that you're not. This video is far from being a stupid video. To me, it shows someone who knows his craft and the knowledge to repair a vehicle correctly. THANK YOU ERIC O for your hard work and do diligence to save customers from the parts cannon concept.

[@chrissiano381]

No video you make is dumb in my opinion. These are very informative teaching videos.

[@BrentPhillips-c5x]

Spoken like a true Technician. Can’t tell you how many time I left my family’s progeny on the hood latch especially a 6.0 diesel! Appreciate your candor, knowledge and relatability.

[@kmartin5054]

Great video Mr. O, especially from the diagnosis to the visual inspection and ultimately the fix!😎

[@ryryk6977]

The mechanic king does it again

[@keithnsearle7393]

It sounded like a false positive due to the rust build up. Good for looking at the point of entry to the cam timer though. It is funny how the other car shop missed that rust point.

[@MRrwmac]

WTG Eric!! Really nice find. That’s using your noodle….haha

[@spunkmire2664]

learned something new about my work truck today. thanks! I got a '02 2500hd. Did my own knock sensors, brake lines, fuel lines and rocker panels.

[@frankm8533]

Excellent video for me as someone who worked in automotive a long time but never learned scanners or wiring problems correctly i could watch this all day

[@1cmking]

"Got to do it without dropping the *shi-stuff* down the hole." Keeping it on the Family friendly... lol

[@boodoorn]

I've been watching your videos for years. Probably 10+ years. I've built my career in heavy equipment. I have learned and continue to learn many of my diagnostic procedures from you. I watch every video no matter what because of how well you explain your diag procedure. Doesn't matter what you're working on, proper diag is proper diag.

[@craiggoodwin9704]

Eric, it's great to watch you process the problem, always "thinking" about what is going on. Finalizing the process with a scope was icing on the cake! 🍰🎂 Appreciate the fact you don't want to touch anything else. I wonder how you expressed that to your customer? Chevy THUNDER still sounds good. Thanks for Sharing! 🙃🙂

[@goodpplz123]

Perfect step by step thinking the problem out. You could be a billionaire with your knowledge and skill but you choose to pass it on to us and I am appreciative.

[@BeingInTheMessiah]

I always put the hat on backwards after it falls off, sends the vibe I'm up close and personal with my work and it was probably a PITA

[@alexanderzubar9593]

Oh Contraire! This was a GREAT video. Shows that not all solutions to signal problems are green crusties or butt splices. You gotta use yer eyes and brains too!

[@jimmiehayes3566]

Not dumb. Good video

[@trotva]

I had exactly the same issue years ago with something else. The rust had expanded the area around a light which kept it from sitting properly thus not working. It's a lot different than your case but with a similar cause. I got so frustrated I tossed my screw driver at the light socket. It popped off the rust, allowing the bulb to sit back properly and work. I fixed the issue without knowing what the issue was until then. This was on a early 1960s panel van conversion I had in 1976-77. It was a slug, but we had fun partying in it during my Senior year.

[@ahummerich2751]

Great job there my son! The king of visual diagnostics.

[@thomasshaffer8547]

You have shown several video's that included rust jacking on wheel speed sensors and over the years you have convinced me that you know rust! But, I find it amazing that the engine block rusted enough to jack that sensor out! Crazy.

[@JoseSilveira-newhandleforYT]

Clever diagnostic strategy, Eric! Good catch of the sensor's bent tab as the cause of no signal. No parts required, only brainpower 🙂

[@danglin69]

Brain power indeed..Had the first fella taken a good look at the removed part he shoulda noticed bent tab as well. It's called visual inspection in the trade. My mentor drilled this into me and thankfully so. Study things carefully as you take em' apart. Most of the time there's an Ah-Ha moment.. Cheers

[@JoseSilveira-newhandleforYT]

@@danglin69 Very true!

[@RagnarokCo]

5:10 was I the only one who activated baby voice and said "Hey Luna! Whattsa matta? You want in? Yea? Yea? C'mere" out loud?

[@paulc38125]

From what you said about not replacing a cam sensor on those before, the OEM original was probably good, just rust jacked.

[@deniscarr469]

Boy, not only is this guy clever enough to think outside the box but he's really funny with it. What a character. Love it.

[@notchback93]

I was once addicted to the Hokey Pokey…. But I turned myself around!

[@SouthMainAuto]

Classic

[@markchidester6239]

Shop vac with a crevis tool next to your scraping device. Absolutely excellent video! Thanks Eric!

[@robhunter2435]

Excellent video Again it stresses the importance of checking power , grounds and signal.

[@stevecorey3399]

It really never ceases to amaze me that these other shops can’t figure out such a simple system. I’m looking at this at six minutes in and I’ve already figured you probably have a crappy cam sensor which needs to get replaced and most likely the cranks answer circuit would be the culprit

[@stevecorey3399]

So I watched the end and ended up being the camp sensor circuit, but for me this was simple since I went to the GM training center back in the 80s as I was a full-time mechanic for me. This was a no-brainer as the symptoms led me to believe it was in, a Hall effect switch

[@pamelasantis6815]

Another job well done. Thanks eric O..

[@louiskogok8940]

Eric, at about 21:30, you said you had to "give this engine a hug". loved it, been there! I don"t think the video was "dumb or stupid". Its what happens in the real world. I've seen rust jacking on wheel speed sensor mounts. The rust raises them up. I replaced both front knuckles on a chevy truck once for low speed involuntary abs activation. Both were just a hunk of rust. We could not see much, but, the explanation of the process you were going through was spot on! So from me, excellent video.