Question about 2004 GMC Envoy

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A/c dont work after changing battery

I change the battery in my 2004 envoy and now the a/c will not cool and short cycles and loads up engine at idle

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  • 11 Answers

Did you check to see if its the right amperage to power your vehicle?

Posted on Jul 29, 2010

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1 Answer

Idle fluctuates


The computer enriches the fuel mixture and then leans it out to see fluctuation and changes at the oxygen sensor readings, these changes forth and back can often be noticed, also AC pumps cycle from time to time for short bursts just to keep them freed up i think. when the AC clutch kicks in the idle will also fluctuate, again it is normal to some degree. As for air pockets fill the cooling system there should be no air pockets at all nothing but coolant. Air does a poor job of drawing heat from the engine from the inside of a cooling system however it works well outside the cooling system.

Feb 15, 2015 | 2001 Lincoln LS

1 Answer

Trouble codes p0118 temperature po118


code p0118 refers to engine coolant temperature (ETC) sensor ---circuit malfunction===causes---coolant thermostat---wiring open circuit/short to positive---wiring short to ground---ground wire defective---ECT sensor.. The temp gauge works off a temperature sender unit separate to the coolant sensor and if it is reading 100 then it indicates an overheat situation in the engine . Probably why the engine light is coming on. As the thermostat is in the list of causes I would replace it as a precaution. The coolant sensor is what tells the CPU to turn on the electric fans to cool the radiator

Jan 13, 2014 | 2004 GMC Envoy

1 Answer

I am losing power when idling...


If your idle speed is less than 600 RPM, the alternator will not be charging the battery. The idle speed could be low because the throttle body needs to be cleaned. Make sure it is cleaned front and back.

Dec 11, 2012 | 2004 GMC Envoy

2 Answers

2002 gmc envoy is over heating have changed the thermostate and the put new radiator but its still over heating any suggestions


Have the FAN CLUTCH checked. they are a common failure. Get a AC DELCO or the part from the dealer. Why was the radiator replaced? Heater work OK? A/C works OK?

Sep 22, 2011 | 2002 GMC Envoy

1 Answer

2006 GMC Envoy.. Changed the battery, and now the A/C will not blow out the front vents. Works on defrost and on the floor, and in the back. What's the deal?


the deal is that your a/c doors are now out of calibration. disconnect battery for 1 minute, hook battery back up. now turn key on, DO NOT START THE ENGINE, let it set for 2 minutes, now start engine, it should now work.

Aug 03, 2011 | 2004 GMC Envoy

1 Answer

I just had to change the battery on my 2004 Envoy XL SLT, and I see that the engine is running faster than before(in drive with the brake on-idle is 900rpms rather than 625 before). The inst economy is...


just drive it for a while, computers will learn and "fix" themselfs when you have to change batt the computer has to re-learn asuming it has no other problems.

Jan 24, 2011 | 2004 GMC Envoy

1 Answer

When my 2004 gmc envoy xuv is idleing i put the heat on n it stalls out.why?


Either you have a vacuum leak or electrical issue.
First Inspect all vacuum lines.
Next test engine vacuum (17-21 hg's)
If all a-ok then its electrical and you got your work cut out for ya.Have to probe the circuit to see where its shorting and what its shorting to. I don't think it will be electrical simple because you would be blowing fuses if it was. Sounds more vacuum related..... and thats worse.

Mar 24, 2010 | 2004 GMC Envoy

1 Answer

Changed battery in 02 envoy, now does not idle right


U have lost the adaptive computer idle learning, do the fllowing and drive it a few days it will clear up.



Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Feb 21, 2010 | 2002 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.

Aug 30, 2009 | 2005 GMC Sierra 1500 Hybrid

1 Answer

2004 Envoy XUV - Causing me to be a Human Thermostat. My heat cycles between cold and hot air. When I set the temp to say 73 degs, the air will blow warm for a bit (like it should), then it will start to...


your vechicle has several temperature sensors you have a lower left and right lower temperature sensors .they are in dash.this is a dealership job.

Apr 19, 2009 | 2004 GMC Envoy

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