Question about 2004 GMC Envoy

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My 2004 Envoy service engine light is on steady until I get on the hiway then it will go out.Also when the engine is first started cold it idles up and down instead of being on high idle .

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2004 Kia low heat at idle hiway speeds ok


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What is the drive cycle for a 2004 Caravan after a sensor has been replaced?


Hello! The Drive-Cycle is as follows...Check engine light off, codes cleared; cold start...Warm up engine 5 minutes...Drive (w/ steady throttle) at a steady speed between 40 and 60 mph for 8 min...Stop and idle 3 min...Drive (w/ steady throttle) at a speed above 20 mph for 2 minutes...Turn key off, leave off 10 min...

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I have a 2004 GMC Envoy XL and the high range 4x4 mode will not engage. The AWD system works just fine as well as the 4x4 mode in low gear. What is causing this?


Is the Service 4WD light coming on? Do the light on the 4x4 selector switch indicate the proper selection and are on steady after a few seconds? If there is no Service 4WD light on and the selector switch light are correct, the only place for the problem to be is the Transfer Case. Has the Transfer Case fluid been changed at 50K mile intervals? This is very important.

Feb 01, 2011 | 2004 GMC Envoy

2 Answers

2004 Envoy xuv 6 cyl when I turn on the A/C the truck stalls but as long as I keep my foot on the gas it will continue to run


Is your "Service engine soon" light on?? If so, have your vehicle's computer scanned for error codes. If not, Clean or replace the IAC valve (idle air control valve). This unit controls airflow through the engine while the gas pedal isnt pressed or A/C is powered on.

Aug 31, 2010 | 2004 GMC Envoy

1 Answer

2004 envoy service engine light stays on. Told


Our mechanic said we need to replace the computer! The cost will be $1,000.

Feb 19, 2010 | 2004 GMC Envoy

2 Answers

My 2004 Envoy had the reduced engine power light come on - it also idles fine then the idle revves up - my guess is the electronic throttle? What do you think? Any idea on price to have it fixed?


Hello,
Yes it sounds like you need a Throttle Actuated Control also known as a TAC. The TAC module or the TAC sensor (pedal assy) then there is the TAC throttle plate assy. There is alot to do in the process of corectly diagnosing this system. I recomend you take it to a qualified technician.
I hope this helps.
Roy

Nov 07, 2009 | 2004 GMC Envoy

2 Answers

2004 GMC Envoy Idling high


sounds like the throttle plate is stuck try cleaning is out do not push on the throttle plate will damage it. have some one sit in the vehicle with their foot on the pedal take a tooth brush and some carb cleaner clean both side of the plate and inside the housing the best you can and see if the stops it.

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1 Answer

Envoy 2004 idle speed


Hi
your problem seems very easy :) hope this one work with your envoy. Just buy AC DELCO carburetor tune-up conditioner.

How you use it: engine running , AC off please

1. detached the big black airflow hose which is attached in the mannifold of the engine block.

2. ask your friend to step on the gas pedal and set the rpm steady in 2000 rpm only.

3. then spray vigorously in 8 seconds the inside circle opening of mannifold while your friend steady step on gas pedal with steady 2000 RPM only.

4. after you spray, let your freind continue on gas pedal with 2000 rpm for 15 more seconds.

5. attached back the airflow big black hose to the manifold and you are ready to roll with your AC on.

if this one doesnt work, please scan your envoy by scanner called TECH II. and find out.

Jul 09, 2008 | 2004 GMC Envoy

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