EVERY Chevy Truck Has This A/C Problem!

Mechanic states Chevy Silverado HVAC system repair. These trucks air conditioning systems leak!
How to fix Chevrolet truck air conditioning leaks. How to recharge truck HVAC system not cooling.

Tools:

Supplies:

Timestamps:
0:00 Intro
0:49 Low Side Port Leak
1:43 High Side Port Leak
3:35 Low Side Valve Replacement
5:04 High Side Valve Replacement
5:45 A/C O-Rings
6:12 Vacuum HVAC System
6:38 UV Dye Leak Detector
7:40 A/C System Recharge
9:26 No Leaks!
9:41 Outro

Chevy GMT800 Chevrolet truck has this air conditioning system problem.
The air conditioning systems on these trucks always have refrigerant leaks.
Here's how to fix A/C leaks.

This works on Chevy Silverado, Avalanche, Tahoe, Suburban, Blazer, GMC Sierra, Yukon, and Cadillac Escalade.
These trucks take R134a Refrigerant.

Trucks:
2001 Chevy Silverado 1500 5.3 V8 4X4 Z71
2002 Chevy Avalanche 5.3 V8
2006 Chevy Silverado 4.8 Vortec V8

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[MattsShop]

Hey! Check out the description if you have this problem. I put a lot of info in there!
Tools:

Supplies:

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[timmg]

So glad I found this video!!! 1999 GMC Sierra 1500 Single cab SWB 2WD. 4.8L. Replaced both Schrader valves. Recharged and 😮 cold air again. Shop quoted my dad 1200 to fix it. 😡 I fixed in 20 minutes with this video thanks

[jonsvideos]

Replace the high side with a dorman 800-955. This replaces the old style with a schrader valve.

[kylelaw]

I believe “Mastercool (81490 R134A Valve Core Remover Installer, Yellow Gold, 6.8 inch” is the tool you are talking about that allows you to change the schrader valve without draining the system. I had an 2001 Silverado and the AC wasn’t blowing as cold as it should. When I added Freon, the schrader valve started leaking. I was able to use the above tool to get it changed out. It was a little tricky. I had to put some grease on top of the schrader valve to get it to stick to the tool. I hope this helps someone out.

[jakehorton]

Dude thank you! It's been 100 degrees or so for like a month where I'm at and my DD Tahoe has not been letting the compressor kick on to charge the system. This was an eye-opening video since I don't know much about AC systems.

[apexputter]

High side fittings leaks are more common than low side, but this is the case with every GM R-134 systems, among others.

[K_MAMA]

THANKS TO YOUR VIDEO, I'll be fixing my '02 Chevrolet 1500 Suburban 5.3L Z71 AC this week as soon as I get the parts and tools!

[stlrsfan]

Let me tell ya my friend ...You have the Best GMT800 videos on all of YouTube. Just picked up a 2001 suburban 1500 5.3 VORTEC .😁 with 170, 000 miles on her. What a beast of a truck. Engine runs like a sewing machine. Keep up the Awesome videos. 🤠

[MrSymbolic]

I had the exact same problem with the low side shrader valve and zero freon, replaced it, pulled vacuum it held and added the correct freon by weight and she cools like brand new, didn't do the dye as it was a rush job, Summer on the Texas Gulf Coast !

[peterjacobs]

You are the king of GMT800 video! I have learned so much.

[RickDohe]

Owned an 03 Suburban for 6 years used. Plastic coolant fittings, AC, blend door actuators, gauge cluster, radio, climate control, window regulators, cheap plastic door panels, door lock actuators, inoperable window washer system and peeling headliners are all major problems I had to deal with. Switched to Ford lol.

[garyh]

My 95 Sonoma leaks down about every 6-8 months. I checked the two obvious Schrader valves and they weren't leaking. I was unaware there was a Schrader valve behind the pressure switch. Also, thanks for linking to the other equipment used. I can not seem to find a new valve cap that actually fits on the low pressure side tho.

[andrewortiz]

All my relays and fuses are good I’m gonna bypass the safety switch to see if my ac comp kicks on and if so I’m going to check all the leak prone valves you described and proceed with your repair

[MauriceEllerbee]

Gotta check the front HVAC fuse in the engine bay as it’s common to blow. If blower setting 5 stops working but all other settings work but the air could blow a little better, before changing the blower and resistor, check the fuse. Should be a small 30amp near the left rear parking lamp fuse. If you have a problem like mine, that fuse was SUPER blown. Changed it and boom bam we’re back in action.

[AM-squt]

Thanks Matt! This gives me a little hope on my father in laws 1998 Chevy Silverado 4x4 2500.... Someone told him that the pump is bad, but I'll go check for that pressure valve. The pump is definitely not coming on and fuse is good. Thanks for the great video! Well documented and discriptive! Also communicated well! Thumbs up AND Subscribed!

[telesasmith]

You are awesome..just the mechanic we all need

[elmerkilred]

Just replace the schrader valve on that fill nipple every time you go to fill/refill the freon. @:47 It gets hot (I guess). It breaks just touching it. I learned all of this great info when a mechanic wanted to charge me $600+ (5 years ago) for a line replacement. I fixed it with a .10cent per dozen schrader valve, and vac, Harbor Freight harness and 4-5 cans of refrigerant all for less than $100. Now when I refill, It costs about $20. just for the cans.

Chevy Suburban 2500 - 2001 Vortec 8.1ltr (496ci).

My new problem I discovered today is that the blower fan was running with the ignition turned off and ran my battery down. It's some sort of control module under the glove box that has to be replaced and you can turn the blower fan off by pulling out a 30amp fuse that goes to the front AC. I haven't looked up the part yet. I'm expecting my actuators to start going any day now, so I may need to go to the auto salvage yard to part hunt.

Thanks for the video!

[stevewhewell]

Have an '06 Silverado 1500 with the 5.3. Never had a problem in 146, 000 miles. A.C. is still as cold as when new.

[Robert-ybis]

It may be in most of them, but for my 2003 escalade I have never replaced it still working

[lotsoftorque]

Great video. My 05 suburban intermittently does not have AC, and after some troubleshooting I believe it is either the high pressure switch, or the compressor itself.