Question about 2004 GMC Envoy

1 Answer

Engine Power Engine shuts off when A/C Compressor comes on

Posted by on

  • labor Jul 30, 2008

    I have a 2004 GMC Envoy with the same problem--shuts off when AC is on. Pep Boys ran a diagnosic and told me I needed a new air compressor 832.00 and map sensor 70.00--just spent more than 1000.00 and it;s still cutting off when I turn on the AC. Mechanic now says that I need to get the computer system reset because it is idling too low when air is on. Somebody help!

    Broke. Frustrated and Hot in New Orleans

  • dpeed2003 May 23, 2009

    Same problem. Engine runs fine until I turn the AC on. Then the idle jumps down, engine sputters and eventually shuts off. As soon as I turn AC off it runs fine again. Started after I disconnected the battery to install a after market stereo. Fixed it by disconnecting the power again however the 3rd time I disconnected the power, it came back and I can't make it stop cutting off.



1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 3 Answers

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.

Posted on Jul 18, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

2007 dodge nitro AC will only work after engine heats up

clutch problem in the ac compressor pulley have it checked

May 22, 2014 | Dodge Nitro Cars & Trucks

1 Answer

Grinding noise coming from alternator or A/C compressor, now engine does not turn off...

Lot of time the A/C compressor bearing brake and lock the belt. After the engine shut down the belt melt and stick to the compressor pulley. remove the belt and start the engine shortly. replace the compressor clutch and bearing or sometimes is better to replace the complete compressor.
Good luck

Apr 16, 2014 | 2008 Hyundai Sonata 3.3

1 Answer

91 Ford F 150 ac/shuts engine down when turned on ,had compressor checked its ok turns freele,even shuts off when defrost is turned on,again compressor and compressor clutch working fine can anyone...

check for excessive power draw from compressor clutch, and blower motor, use a volt meter to check for power drop, other possibility draw on ecm it controls all engine functions

Sep 01, 2013 | 1995 Volkswagen Jetta

1 Answer

Ac works but when compressor cycles, it wont come back on until i rev engine to 4500 to 5000 rpm's and compressor kicks back on until it cycles again. i have to repeat reving engine every time com

you need to check the pressure of the system if the system is a little low on freon it will cycle more also if the cooling fan is not working the pressure will raise and also shut off

Aug 17, 2012 | 1997 Nissan Pickup

1 Answer

What exactly does max a/c and norm a/c do; the difference, and performance? What does recirc do and why is it available during max, norm, and bilev but not during defrost? The same a/c properties are...

Hello: Max cooling is when the recirculate door opens. With the recirculate door open, 80% of the air flow comes from inside of the car and 20% is outside air. That makes the cooling more efficient. Normal a/c operation is 100% of airflow comes from the outside. These settings have nothing to do with compressor operation. Also Decreasing or increasing the amount of cooling has nothing to do with compressor operation, what that does is control the amount of air going from the evaporator core either through or past the heater core. The a/c compressor runs the same amount of time regardless of settings on the control panel. Also in cool weather the compressor runs in the defrost mode to keep the windows from fogging up. None of these settings affect performance, the only time performance is affected is wide open throttle (WOT) in that mode the engine computer shuts off the compressor to allow max power of the engine, ie: passing gear.. When A/C is selected the compressor is on, none of the settings will affect gas mileage, ie, low/high, max/normal 60 degree or 90 degree.

Jul 22, 2011 | 1997 Buick LeSabre

1 Answer

2000 Chevy Cavalier making a noise when air is shut off

This problem sounds like the aircompressor pully, the bearing is shot.
With the engine running and the air conditioner off there is a grinding noise, look at the compressor pully, does it wobble? Then turn on the air conditioner and the noise stops, look at the compressor pully again, the wobble stops? If so that's the problem.

Jun 27, 2010 | 1996 Chevrolet Cavalier

2 Answers

Have loud noise coming from engine. mechanic said it was compressor. it rattles in front of engine. how long can I wait to fix? they said water pump is good. just relaced the radiator and also converter in...

You should replace the compressor asap. Your car's compressor, alternator, and steering pump run on one belt If your compressor has a catastrophic failure and seizes or its pulley comes off you would lose power steering and charging of the battery. Additionally, the pulley could damage the radiator or other components if it comes off. If cost is an object you can have the compressor replaced without having the ac system recharged.

Jun 13, 2010 | 1997 Saturn SL

1 Answer

2003 Honda Pilot a/c compressor stopping after 2 secs.

If i was guessing on this problem i would say that the pressure switch is malfunctioning and telling the computer to shut the a/c down. It could be a power stearing or a throttle switch as well.

Jul 24, 2009 | 2003 Honda Pilot

1 Answer

A/c compressor wont come on.


Jul 30, 2008 | 1995 Volvo 850

Not finding what you are looking for?
2004 GMC Envoy Logo

Related Topics:

430 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts


Level 3 Expert

77499 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides