2002-2009 4.2L GMC Envoy Trailblazer a/c compressor replacement 

Sorry for you loss

You're welcome, thanks for watching!

Thank you!

Good luck!

You're welcome. Thanks for watching!

I've gone through like three or so fan clutches in mine. The current one ever since i installed it has a random "tick" here and there but it's been fine for 50k so far.

@@wullahblack6452 Mine did a tick-tick-tick-tick. Then do it again when it first started. Especially in winter when it was below freezing. It stopped when it went bad this last time. It lasted at least 80,000. It has 230,000 now. Just did all new brakes and another exhaust from Autozone exhaust parts isle. LOL

@@mjb12141963 That is the nice thing about them. They made so many of these vehicles across five different GM brands that the parts are still easy to get, not to mention cheap! My 03 LTZ is the best used car I ever bought. I have been looking to get a used SS but it is very difficult to find one that hasn't been driven into the ground :D

@@wullahblack6452 what 5 different brands?

@@mjb12141963 Buick Rainier, Oldsmobile Bravada, GMC Envoy, Saab 9-7x, Izuzu Ascender And of course, the Chevy Trailblazer. So six total variants.

Handy woman Cart. You are welcome. I took the battery tray out to make more room to get the compressor out. Not much room for it.

Hello lady good for you u are doing your repairs how did it go any troubles

I wondered the same thing.

There is a cost factor involved most are not willing to pay, so I didn't do it. All that aside, it blows cold as new the way it is, and it's still working. If they complained about air quality, I would have sold more parts. I am also MACS certified, and do realize the consensus is to sell as many parts as possible to make the most amount of money while telling people if they do not do it, it will not work. Essentially it is less than a half truth. The truth is, people don"t know if there is "trash" in the system, or how much, or how much moisture is in the system. The consensus disregards how the components in the system have failed. It's a guess, so the consensus is to just do it, just in case, and makes people spend gob loads of money, or else. Making what you are taught borderline illegal. Truth is, the system required a compressor, and may require one again. I could sell more if the air quality was not good enough. A good way to look for trash in the system is to take out the fixed orifice tube, and see what comes with it. When I retrofitted 134a, a long time ago, we used a cleaner, and pressure pot to clean the system, replaced the drier, and FOT. It is a better idea than replacing a few parts that people do now days. There is always going to be residual particles of metal (mostly aluminum) in the lines, and other parts you do not replace that is mixed with the left over oil, and stuck to the inside of the parts. Essentially, I believe that what just about everyone does with an A/C repair is a dirty hack job full of half truths. I try to be honest, and tell the victim what the failed part is, what the standard recommendation is, give them the good, better, best scenario, and let them be the deciding factor. I hope I do not need to explain what I do with A/C systems to you guru's anymore. It is quite mundane to me. Thanks for watching. I hope something i did helped you in some way. Sorry for the long post.

@@RustBeltAuto no I wasnt criticizing you Sir. it is an excellent video. just explaining to the other viewers.

@@averydomingue4638 fair enough.

Actually you can flush the system, replace comp and accumulator, as well as orifice tube. Most parts houses require those parts for comp warranty anyhow.

You probaly have 2 wheel drive. 4 wheel drive has a big ugly axle in the way. We don't have those in these parts. They get stuck in the snow. If we want to get stuck in the snow, we just buy a car.

Is yours 4 wheel drive?

@@RustBeltAuto no it’s not , is this one 4WD?

@@kevyythemechanic yes. I think there was a big fat axle in my way.

@@RustBeltAuto 😂😂 my b

Keep her clean champ.. These Trailblazers are to be respected

No. Gravity is on your side. The only stupid question is one that is asked twice.

You are supposed to dump it out.

Sometimes they are not on the compressor on some vehicles. If it works without it, it is probably not used, or someplace else. Should be on the high side line somewhere. Did you ever unplug it?

Go to a shop and have them re-claim the refrigerant. You second answer is, you can try. Good luck!

It'll blow out if you crack a line pretty much any where. Although, you should get it removed by a pro and in some states it's probably illegal to just let it go.

pag 46 with dye oil

You mean an impact wrench or air ratchet or something?

I have never known it to matter. The oil goes where it wants.

unbolt them

Nope. Just sucking air.

This is something you did? Was there any issues with it slipping?

I put it in the cold side. Just run the thing.

Rust Belt Auto so it wouldn’t effect it if I put 3* oz in each side will I be safe or I have to do it again

@@arifelassal2874 6 oz seems like a little much unless the system is completely dry, or replace other parts. I usually do about 3 oz. Just run the thing.

On a positive note, that car's A/c still works fine, and it doesn't matter what hole it goes in. Oil in the system is flying all over the place.

Thank you sir it works amazing and yes I changed the compressor and condenser accumulator and orffice tube

Cannot remember. Have a whole set.

Got mine from Mac. Google "stud socket", and a bunch will show up.

I dont know

Can't remember.

Do you have 2 wheel drive?

probably PAG 46.

@@RustBeltAuto that's the oil you poured into the compressor

@@leannemc.4314 I think so.

I don't know. If you ask for a belt with no a/C, that will probably be your can't you just belt.

There should be a yellow sticker somewhere in the engine compartment that will tell you how much goes in the system. Drain out old compressor, and add the same amount plus 3 ounces if you had a large leak, and an empty system. Or just the amount drained plus about an ounce if it was full of refrigerant and no oil leaked out. There should be oil in the new compressor too. 3 ounces extra is safe almost always.

@@RustBeltAuto please help me I can't found any thing tell me how much should I put I have GMC envoy XL 2006

@@Asa700empty new compressor. drain old compressor. Add that amount, plus an extra ounce. If it had a small leak, and emptied the system, add an ounce. Large leak, like a line broke, or big hole, add 3 ounces.

@@RustBeltAuto thank you

I used a swivel ratchet, and a short ratchet on that car truck thing. I think they are all 15mm.

Thank you👍

@@j0s3b4rr3r4 welcome. Hope it helps.

It's still working. 🙃

No. Due to copyright infringements, there is no TOOL playing in the background.

It depends on the vehicle. Follow the high pressure line around (the little one) it could be anywhere. Once in a while the manufacturers put it on the big line, before the fixed orifice tube, if it has one.

What!?!?!?!?!?! There is an exhaust pressure gauge you screw into your o2 bung to see if it has excessive back pressure. Unplug your AC clutch if you believe your compressor is the problem, drive it around a bunch, and see if it doesn't die.

Works okay when your driving down the rd?

You should really go to a shop that does A/C work, and have them re-claim it.

@@RustBeltAuto can i not do this one myself?

You are not supposed to open referigant to the atmosphere, by slightly unscrewing a line, to let it slowly leak out, or slightly unscrewing a Schrader valve. I think it's illegal.

@@RustBeltAuto can i use a vacuum pump?

@@RustBeltAuto my 2002 has a bipassed ac compressor. Shorter belt. I dont plan on changing out the dryer

Whatchu mean?

More room after removing the battery box .lol never any room to work

I don't know

Strange. It works for me.

All the other videos load up fine but this one. All I get is a black screen with that stupid circle going around and around.@@RustBeltAuto

@@DHMSLLC Maybe it's too good for you, or RU-vid doesn't like me anymore? I don't know what to say? I can watch it. I logged out of my account, and watched it too.

There is a big front axle in the way. You must have 2wd.

Yeah if it's 4WD you can't get at it from the driver's tire.

@@thegrimtaho Hello, I have a 2WD Envoy and I'm trying to figure out how difficult it were to replace the ac compressor. Mine has recentely started grinding.

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