Question about 2002 GMC Envoy

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I have a 2002 GMC Envoy with a premium towing package, and it tends to stall when running at low speeds. This happens frequently when I first begin to drive it.

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New injectors

Posted on Jun 30, 2009

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I have 2002 gmc envoy, oil pressure low, stop engine warning only comes on when i stop on a hill?


The pressure regulator in the oil pump may not be working, the idle speed may be too low and there may be a lot of wear on internal engine parts lowering oil pressure

May 30, 2014 | 2002 GMC Envoy

1 Answer

My 2005 envoy stalls when i run the heater and a/c


It will tend to stall when you have the A/C on and or the defrost, not the heater correct? The defrost uses the A/C to dry the air. The battery was probably disconnected or changed recently. Clean your throttle body with throttle body cleaner while the battery is disconnected. When finished, drive around for 5 miles or so with the A/C and Defroster off. Your computer will relearn the the newly cleaned throttle body. This will fix this very common problem. Will cost you about 7 bucks for the cleaner and you're gas mileage will be better.

Dec 24, 2010 | 2002 GMC Envoy

2 Answers

Engine idle to high. how do i turn it down 2002 envoy


the idle is not adjustable on this vehicle, it's computer controlled.. sounds like a large vacume leak. open the hood and listen for a loud hissing noise.. check the pcv hose, they tend to come off.

Jul 08, 2010 | 2002 GMC Envoy

1 Answer

GMC Envoy 2002. When I get to traffic stop light. It will stall .. RPM is about 500 at idle. Doesn't do it when cold ( idle around 1000RPM. runs ok when driving just stalls when you get to stop sign or...


check your vaucumn hoses for leaks any leak in that system will effect your fuel pressure regulator and fuel rail that controls the running ability

Jan 14, 2010 | 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

The blower speed switch only works on 5. The


this problem is caused by a defective blower speed control resistor, it is located near the blower motor, very cheap to replace, part is around $35

Oct 26, 2009 | 2002 GMC Envoy

2 Answers

I have a 2003 GMC Envoy, trans slipping that I have been towing


Low fluid can cause slipping. (depends upon how low) Most manufacturers post "safe" tow speeds. These are generally ignored. (not good). I recommend towing with driveshafts removed and where driveshaft has a "slip yoke" you install a yoke from a scrapyard and wire it to the tailshaft so it stays in place (keeps oil in and dirt out) Although you can't just detach the tow-bar and drive, it eliminates any possibility of trans damage, since the transmission cannot turn. (most use oil from pump to keep gearsets cool...when towing, pump is not pumping and over time and distance it can damage trans internals.)
Hope your problem is just low fluid and not a rebuild...keep in mind what I said though.

Jun 09, 2009 | 2003 GMC Envoy

1 Answer

2002 GMC Envoy 4x2


you have to take to the shop for correction. There is a computer update that will tell the system to adjust, and make it run fine. It happens frequently for all of you that have recently had your fan clutch repaired. Have to do the computer adjustment, which I only trust the dealer to do.

Jul 03, 2008 | 2002 GMC Envoy

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