GMC TRUCK A/C RANDOMLY STOPS WORKING DIAGNOSIS & FIX

In today's video we take a look at a 2005 GMC Sierra pickup truck with a 5.3l V8 engine. The customers complaint is that the Air conditioning intermittently blows hot air. Follow along as I show you a few techniques to help you troubleshoot your randomly failing a/c compressor clutch coil.
!!!Please don't forget to "LIKE" the video & "SUBSCRIBE" to the channel!!!
**********************************************************************
*If this video helped you in any way and you would like to donate. Please
Click the link to Donate! paypal.me/advancedlevelauto​​​
Thank you so much for your support!
************************************************************************
THINKCAR THINKTOOL PRO Scan Tool
Check it out here! amzn.to/3s6j55G​​​​​
**************************************************************************
Visit our Amazon store here www.amazon.com/shop/advancedl...
to shop for our channels recommended tools and gadgets!
************************************************************************
If you enjoyed this music then checkout Epidemic Sound here!www.epidemicsound.com/referra...
*************************************************************************
*You can email your questions and concerns to [e-mail]
Disclaimer:
Due to factors beyond the control of Advanced Level Auto, I cannot guarantee against improper use or unauthorized modifications of this information. Advanced Level Auto assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. Advanced Level Auto recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of Advanced Level Auto, no information contained in this video shall create any expressed 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 from the information contained in this video is the sole responsibility of the user and not Advanced Level Auto.

[@joebedwell4750]

Great concise video that explained why my 2004 GMC Sierra A/C would stop blowing cold air. THANK YOU!

[@alfredocarpaneto5976]

My GM was doing the same thing, pressure switch was going bad. $13 at Oreilly. I diagnosed it with my $0 hand scan tool, I wiggled it and got it to replicate the problem.

[@chapin615]

The amount of knowledge I gain from this channel !!!Thanks for videos. They’ve taught me alot. 👌👌

[@pontiacsrule8761]

Your videos are always right to the point. Thanks so much for making this, I really enjoy them

[@drgolfjim]

Way better video than most. You speak fluently without a lot of ers and ums. Thank you.

[@jimbo2.094]

Great diagnosis. Being a DIY guy, always an informative watch!!

[@evelioa33]

The corridors part was so funny lmfaoo keep up the good work !

[@ricardotellez1050]

Amazing man ! I'm gaining so much diagnostic knowledge thanks man I appreciate it 🙏

[@mercedesfriesland]

I like your way of diagnose the problem.

[@djosbun]

Great video, Eric! In my experience, buying a complete compressor (with AC clutch coil) is almost the same price as buying just the coil itself. Doesn't really make much sense nowadays to not replace the compressor itself.

[@stealthg35infiniti94]

Like Ivan @ PHAD always says, you have to be 110% sure before replacing parts. Good job Eric in proving the problem.

[@sandybarnes887]

Yup, just like Eric O at SMA. These pros rarely fire the parts cannon.

[@trevorrigsby8280]

Bro said it was the clutch and then replaced the whole compressor, etc ,etc… seems unnecessary.

[@CraigPetty555]

Thanks Eric, for another awesome video!!

[@jgeorges3061]

ERIC, great approach to diagnosing this truck by using the scanner and looking at data always good info thanks for sharing.

[@JoeBribem]

You gotta love customers that understand the importance of getting other work done when it's there and apart at your fingertips.

[@randydarby2340]

Yea, thats most likely why there is 300k on it originally! I'm here solving the same issue though I'm only at 225k on my 2000 Silverado, replaced the switch on the dryer already since it was original and didn't cost but $20. My problem still exists though and it quits blowing cold and doesn't get cold again unless i shut truck off and it resets system!

[@JoeBribem]

This isn't a duct actuator issue is it?@@randydarby2340

[@JT-lq4yd]

13:23 just about anyone can replace an AC compressor, alternator, starter, etc. Getting the correct diagnosis in the first place is a different story, this is what I am here for. Excellent! Thanks for the tips and tricks.

[@reggieos6945]

fire the parts cannon

[@andrewvillanueva4222]

Bro you are awesome mechanic. You Eric O, Alex I think name is, put out some of the best car repair videos. Thank again.

[@richard1835]

Thank you. Great Video. Worked on a R1234yf system today.

[@diazhomeservicez]

Keep your very informative content coming and blast them corridos.

[@victorramosjr2239]

Finally, a video that pertains to my issue... somewhat. My AC sometimes works. And sometimes it blows "cool" but not cold. Now I'm starting to think its the compressor clutch, especially with 282,000 miles.

[@jnew6808]

You are the Man! That's exactly what's happening to my 2014 Chevy Express van. But my fan turns completely off for about 10 to 15 seconds. Then blast back on 🤔

[@ganeshnarayan5505]

Great video Eric. Thanks for sharing.

[@autoacoustics4938]

Sometimes its the thermal fuse link inside the clutch coil that gives you this problem , good to see you up getting back on it again

[@j.maxwaddell2557]

GREAT job Eric. I did find it educational. Enjoy

[@WaybackTECH]

331k miles on the odo is what impressed me.

[@tallboy2234]

Very insightful on the Intermittent problem. Have a 06 Chevy Silverado that has just begun with this intermittent on/ off crapola 😡🤬 guess it’s time to visit my own mechanic extrodinaire 🤬

[@angelp9658]

Good job !! From Sarasota, Florida !! Were the best never Rest!

[@IAMNOSLEEP]

Thanks for sharing Eric... Cheers.

[@ahmadalozn7561]

Respect to the mechanic

[@alvaroreyes4707]

Good job bro, always love your videos🤙

[@rubenvilla7705]

Man thank you so much bro this is exactly what going on with my truck bro I've been taking it to a couple of people and the tell me different things. Thank again man

[@guitarguy3221]

Super helpful video i have the same truck same problem 👍 Ty 1yr old compressor no leaks good psi

[@sulemanhabib1743]

Thank u for directions on the live data, A.L.A u are too much, lovely job meeeiiiinnnn. Habib Auto all day way from Ghana West Africa

[@mikecont9742]

Great diagnostic video...

[@peterromero9395]

Good job on the video, very informative.

[@stacydornan9765]

Your a smart dude bro,Love your channel

[@cliffordgallagher4531]

Always Entertaining and Informative my friend!

[@rockyrengo]

VANTASTIC video!!!! THANKS!!

[@dans_Learning_Curve]

Like#125 Thanks for the video! Life is a learning curve! HINDSIGHT is 20-15!

[@fire7765]

Great job

[@westfield90]

I really love your channel

[@magdalenoybarra2793]

Cool vid bro Thanks. Greetings from Texas.

[@alialix2076]

Man man man ... you are the man ...Thanks bro

[@luis140500]

Amazing video man keep them coming 👍

[@nestorlugo.]

It's a 13 min video uploaded 4 min ago. How do you know? lol

[@88camaroman]

Great work

[@PhillyDee215]

Summer is here baby🔥

[@richardrodriguez2750]

Greate video , well explained !!

[@nfl2254fan69]

Very nicely done video

[@anthonysalonek1509]

thanks again Eric

[@kennethcamilotes7694]

GREAT VIDEO BOSS👍👍👍👍

[@mcrowley8460]

2:00 Bro you gotta do that speed lapse & good music at nighttime with the dash lights at max bright next time! Good vid man.

[@Jpilgrim30]

Sometimes they’ll do that when the clutch gap has become too large from wear. Most of those Chevy trucks you can get some more life out of the compressor if you take off the front plate on the clutch and remove the spacer behind it. You can do it without removing the compressor too.

[@jcortes3930]

🤔

[@canalroadadventures5079]

See EricO at South Main Auto how to test and then repair the clutch.

[@WizzRacing]

Setting the Air Gap would not have fixed this issue. As it did work. The Coil was simply breaking down once it got hot..

[@Jpilgrim30]

@@WizzRacing there is no way to know that without testing it while it was failing. The magnet gets weaker with heat and when the compressor cycles off and back on its not strong enough to close the gap. A bump or vibration can give it the little extra help it needs. To say definitely that they could windings failed when hot when they were never tested under the failed condition is pure speculation. It happens but I’ve had dozens of these trucks over the years in the shop fail this way and I’ve help customers who couldn’t afford getting the compressor replaced get by with just setting the gap on the clutch.

[@WizzRacing]

@@Jpilgrim30 You can test the coil. Just put an ohm meter on it.. And no setting the Air Gap does not fix it..As it uses a washer. If the Clutch is wore down that far. It needs to get replaced anyways. So why waste all that Freon. Time and Labor. To only have it come back for a failed Clutch.. Just replace the whole unit..

[@biofall38]

You can recover the refrigerant with a recovery tank dipped into an ice bath works really well

[@boomalaki23ii45]

Front brakes, 4 struts, compressor and some other AC components all in a day? Hats off to you, that’s a lot of work! Were those complete struts or just the struts themselves?

[@jonk6137]

Still an auto genius

[@jimmyaber5920]

Intermittent failing clutch is diagnosed with amp probe in addition to things that were verified on this vehicle. The clutch gap was wide on the compressor as it was visible when he showed the old compressor. Wide clutch gap would still give amp draw of 2.5-4.5 A where failed mag winding would drop amperage to 0. If you don’t have amp probe you let it quit cooling and the safely tap clutch plate to see if bumping it allows engagement. With wide gap the reduced strength of hotter winding is too weak to pull clutch plate into pulley plate and the bump will do it. Windings can have a short (very rare) and do the initial function and then quit but usually these blow a fuse as the current draw goes up. With 300 K miles a new compressor was a good idea anyway.

[@h8breed67]

Muy Bien... gracias

[@dannylinc6247]

You can also find the cause with the ac compressor clutch. If it has a field coil that opens within itself, there may be an updated field coil to solve the issue. You could check service bulletins and find the part number that stays fixed and doesn't fail again. Two ways to look at it. When it's an aged system, the improver coil may be in the parts kit and save money by not having a later failure unrelated to this repair. A lower mileage truck with warranty would just need the field coil. That how they would be required to approach it in most cases. No interruption to the system, just the engagement being corrected.

[@tylerwightman2315]

Damn. 300,000+ miles on Chevy compressor! They just don't build them like they used to! You absolutely wont find a newer Chevy that will last that long. Ive replaced several that took a turn south before even making it to 100,000. Nice diag. That's exactly how I would have done it. Love the channel!

[@anybody2542]

Just hit 300k guess that's why my a/c died 😂

[@gaelylesly]

a mi también me gustó lo de los corridos. saludos desde el valle

[@mikechiodetti4482]

Very good diag. Intermittents can be a p.i.t.a., especially when they're extremely intermittent. Putting the system under load helps to locate it more quickly like you did. Hot weather helps also. You had the shop recover the freon. Did they put it in a container for you to reuse, or did you give it to the shop and you used new freon?

[@JL-qi8lg]

1. First thing check your freon. Low on Freon will disengaged clutch as well. 2. Rpm 2000 and check for pressure on your gauges drop.

[@user-dr8jj6sb4g]

Great video! I just the A/C components in my 2002 GMC Sierra 1500HD SLE Crewcab. Had the system vacuumed/recharged before and after removing/replacing the A/C parts. Passed the leak test as well. The issue I have is with the A/C condenser fan that short cycles. Can you tell why it does that and how to fix it?

[@paulszo]

Thanks for the video. I have a 2006 GMC Sierra 2500 with a 6.0. A/C works good as long as your running. Then if I stop for a series of traffic lights it starts to blow out warm air. Cost wise what do you guys get for a job like you did parts and labor?

[@alanmartin729]

The hotter it gets the less the magnetism is the air gap might be to great on the clutch just a quess ty nice vidio

[@USUFSATE]

Sukses selalu lanjut good

[@alex4alexn]

got the same truck, would have loved to see what lowside pressure you ended up when all was added ias as i have to do a similar job on my truck. i know it is realated to outside temp but I always struggle with the pressures.

[@stanghp1]

Great work, did you check the MIL light? Or is that extra $, just curious...

[@transientemotion]

I had this issue in a 2005 chevy silverado. One of the radiator fan relays had a poor connection. So driving the ac would turn off from regular bumps or stop and go. When the ac is on both fans should be on or on another car something easy to check. Press down on the relays see if one or both fans come on with ac on

[@mikerodr]

You pull a vacuum to empty the lines of Air / Oxygen & Moisture / Humidity so the Refrigerant (Freon) is more efficient and the AC cools better. After pulling the vacuum shut the valves and make sure the needles hold steady ( 20 minutes) to verify there are no leaks before charging the system. Finally, purge the air in the supply line before releasing the Freon into the system.

[@fernandolopez-db8wr]

Eric that background music did not sound like CORRIDOS! Jaja

[@topher8634]

Probably could've reset air gap and would've been OK but 330K is a lot of wear on that compressor. Great job.

[@USBCablez]

Wish I was smart like this

[@MrAmk3rd]

Eric, when did you record this? The tag sticker on the window shows 2014. Are the tags that old? Good vid, again. Good process figuring out the issue. 🤘

[@MrAmk3rd]

@@crisprtalk6963 Nope, it's a state tag sticker. I'm in TX. That reads 06 of 14.

[@HomieHektor]

Puro pinche corridos ALV 🎶 Viva Mexico Cabrones!!!

[@shinigamidaiko666]

My favorite automotive KZbin content creators gotta support raza

[@htownblue11]

HEEEEKKKKTTTOOOORRR!!! Good to see you supporting another great mechanic like yourself my man.

[@hectortijerina3950]

I've had this problem with compressors like this, you snap the gas wot and the compressor kicks in again. why ? Great diagnosis.

[@barstadryan]

Most ac systems are designed to disengage the clutch during WOT

[@oldbiker9739]

@@barstadryan Honda does that as well save the hp on WOT

[@martinarrieta248]

Grasias

[@stangfan93]

I was having this problem, the low pressure line would freeze over and you’d see ice all over it when the ac was in 1-2 setting. But, if you put it to 5, it would defrost and then blow cold again.

[@fredsalter1915]

Dang, my brother! You need to buy yourself an AC evac setup!!!

[@charlesmecum5009]

I wrk from my home as well,what do u charge for labor being at home versus going out mobile

[@mikerodr]

What he was trying to say is that before you break the lines lose rather than releasing the Freon into the Atmosphere go to a bigger shop that has the special equipment that can recover and recycle the Freon to protect the OZONE layer and also comply with EPA Rules. That is was a Pro A/C mechanic does.

[@trebrown8144]

Ozone layer is milarky bud. Same way they want powers to govern over medical emergency is the same plot to take our freedoms and not give them back under the guise of climate, it's all bullshit they are just priming you to take the bait before they even throw it😂

[@stevestine9769]

Have a similar problem 04 silverado. A/C comes on drive a few miles then HOT air blows from the 2 drivers side vents but the passenger side vents stay cold. Shut the trk down & restart it works fine ??

[@stefanos204]

Hi eric i have a question for you . how did you flush the AC lines make a video thank you

[@sheeshalready]

Another solid video. Didn't you own an AC machine at your shop?

[@ADVANCEDLEVELAUTO]

Yes. I sure do miss that machine.

[@shaungreenlee2376]

I had something similar happen with my 2001 Chevy Silverado Ext Cab 4x4 Z71, I left my truck idling with A/C on and went into store and came out 10-15 minutes later it was blowing HOT air out the vents and the interior temp was extremely high inside the truck, even with the A/C still suppose to be on, however the A/C never stops working while truck is moving and is cold as hell...?

[@noeltobongomez4707]

Do you think this can be causing my door blend actuators not to get any power at all ? My truck only blows warm air no cold at all it’s an 03 Silverado 1500

[@kennethmckee4223]

Thinking about buying scan tool X431 Launch or Thinktool Pro.Do a lot diagnosis like yourself which one do you recommend.

[@sandybarnes887]

The Pro has a link in the description

[@justinw.7407]

Just out of curiosity, how many different scan tools do you have?

[@thorsoldier666]

I have a question! I Have a 2004 Chevy tahoe 4.8L my ac doesnt work, but even when the ac is off still blowing hot air, and when is on ac is only blowing HOT AIR, i replace the the pressure switch , i replace the actuator under passenger side( was a pain in the rear) , but nothing is fixing it i can see the compressor click on but not stay on, starts but stops right away WHAT DO YOU THINK? COMPRESSOR MIGHT BE BAD?

[@rrfields65]

Expansion valve thermostat going out ! It cycles the a/c clutch on & off to allow any ice formation to melt out of inside coil , especially in hot- humid climates. If the mercury is escaping ,them the switch will not cut on the a/c comp.clutch.

[@TheGregWallace]

Question, my 2004 1500 ac push button switch on the dash seems not work, weather it shows on or off, "it it is always on"...... The ac gets very cold down to 39 degrees, but sometimes it will not reach 39 degrees and will stay around 48 degrees. If I jump the pressure switch connector it immediately goes down to 39 degrees. When the pressure switch is connected it sometimes will go down to 39 degrees and sometimes not. My question is do you think I have a bad pressure switch and I'm not sure why the dash button will not turn on or off the ac... it just stays on. PS it is not the blend doors causing it to go hot or cold.

[@ezboyrc553]

I thought that the compressors would kick off if they were just low on free on as well my on as well. mind did the same thing I just put more freon in it & I didn't have to replace the compressor luckily.

[@marcpalmer4144]

Do you have a link to the kit you bought?

[@eliezernegron333]

Was good Eric I have a problem . my 09 altima 2.5 . i have a p0335 . i check the ckp malfunction and did all the electric first and no signal ckp then i took the ckp out and the middle pin was bend so i thud that was the problem. So change it .reset the light but the light went off and came back but the second time is off .so the question is do i have to do a relearn on this 🙏🙏🙏🙏

[@MusicMinisterJP7]

Hello,, I'm little perplexed.. I am currently looking to help a neighbor with his Chevy Sub 1500LS A/C.. and I was trying to find the two ports ar which the red and blue hoses connect to. I'm perplexed bcuz I am seeing your red hose connected to "the coolant reservoir??? Is that the location? I can't seem to find it. Can you explain where the high side port is? Thx.

[@jimboslice8885]

I replaced my clutch coil.. it engaged after I installed it.. the next day I started the car and the clutch would not engage.. also the fan connected to the pressure switch.. will a loss of pressure keep these components from working.. I suspect low pressure via leak?

[@nestley22]

are you in texas? would love to have you look at my tundra

[@smms5056]

👍👍

[@gabrielrios6830]

I have a 2015 Yukon SLT that I changed the evaporator core and fan blower.Now suddenly it started to blow hot air .I parked it and turn it off for 4 hrs and turn back on and now is working

[@charliegcanadianpatriot7781]

Man, that truck is a mobile trash can, and what's up with the roof liner ? With regards to the fix and several rides with the scan tools hooked up... why wouldn't you apply a known good 12v power right at the clutch in order to verify clutch operation immediately, then work back from there if need be ? I like your videos, please keep 'em coming.

[@rudycontreras8126]

Hey brother I have a issues with both of my truck doing the same thing except they both have new radiatior condenser dryer and compressors also replaced cabin filter and it’s still doing the same thing turning off it flashes the light on the ac control ? Any ideas?