Question about 2002 GMC Envoy

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The AC isn't working in my 2002 GMC Envoy. I'm

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The a/c system has to be drained and the line has to be replaced/ repaired... I do not know of any where to get the repair kit without working at a shop, but you probably could get the lines from the dealership, or possibly aftermarket depending on availability... the most important thing is making sure the a/c system is drained i had an unexperianced tech i worked with that did not have the system completly drained and end up getting freon in his eye and doing perminant damage from frostbite to his eye.... so be very careful and be sure that the system is empty..... depending on where it is leaking and which line i could give you more info on how to replace it if you would like with some more information about where the leak is and etc.

Posted on May 24, 2011

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1 Answer

My rear AC and heat blower stays running after I


Rear fan relay is stuck. Replace the relay.

Aug 28, 2014 | 2002 GMC Envoy

1 Answer

2002 GMC Envoy idle goes low when AC is turned on


There is usually an idle solenoid on the throttle body that is designed to bump up the idle when the A/C is switched on, this could be bad, or out of adjustment.

Jul 10, 2012 | 2002 GMC Envoy

1 Answer

I took my 02 envoy to get checked an the machine said i had a leak in the vaccum pipeline what does it sound like i need to do


The age of your vehicle guarantee's a vacuum leak. It may sound silly but the truth is rubber grommets and hose's shrink and dry out over time and the harsh environment under the hood makes it worse. Check all vacuum lines and fittings attached to the intake manifold, valve covers(pcv valve), and be sure to check for a vacuum fitting on top of the intake just behind the throttle body. Does it fit tight in the hole? You can seal loose fittings with a high-temp RTV (Red) silicone sealant/adhesive. Several small leaks add up and your engine, heat/AC, will be all to glad to tell you about it.

Check the vacuum line under and in front of the throttle body...with engine idling. It is located under where the air filter snorkel attaches to the engine. Then check all vacuum lines at the intake manifold. Check vacuum lines at distribution block on firewall and check the large brake booster vacuum line from one end to the other. You'll find it!

Aug 17, 2011 | 2002 GMC Envoy

2 Answers

Where is the relay and/or in line fuse for the back up lights on a 2002 GMC Envoy. New bulbs and fuses are fine in both fuse boxes. Still not working so there must be a in line fuse or relay out?


check the neutral safety switch. connected to the shift lever, keeps you from running the starter unless in park or neutral, AND it turns on the back up lights when in reverse.

Jun 27, 2011 | 2002 GMC Envoy

1 Answer

2002 envoy ac and heat not working but fan still works, what can be the cause


if your waste gate doors aren't opening you wont feel anything, could be bad a/c - heater control assy.

May 18, 2011 | 2002 GMC Envoy

1 Answer

My battery in my 2002 gmc envoy dies over night what would drain the battery alternator is good


Check and make sure nothing is staying on ie. lights. Check the cells on your battery to make sure they are good. It is possible the battery isn't holding a charge.

May 09, 2011 | 2002 GMC Envoy

1 Answer

The fan that blows both AC and heat has quit working on my 2002 Envoy. At first, it took several minutes to begin blowing after being turned on, now nothing. Any ideas?


check the heater eliment under the passenger side of the truck ,remove the black cover and wiggle the plug they tend to loose connection

Nov 09, 2009 | 2002 GMC Envoy

2 Answers

Replaced battery on 2002 gmc envoy. now it goes dead when air is


your alternator may be the problem here. When the AC is on, the motor has to work harder, and the fans need eletricity to spin (unless they are powered by a belt, unsure). If the alternator can't keep up the battery will die.

Aug 15, 2009 | 2002 GMC Envoy

1 Answer

2002 Envoy AC only works on auto and for a short time


replace control head if the ac works on auto

Jul 03, 2009 | 2002 GMC Envoy

1 Answer

Charge ac


It is located under the hood in the larger of the 2 AC lines, this large line is the low pressure line, also check on the round can the low side line connects to as it can be on that as well, that part is called the Accumulator/reciever drier

Apr 26, 2009 | 2004 GMC Envoy

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