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Envoy rear ac/radio controls no power - 2004 GMC Envoy

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 86 Answers

SOURCE: no air coming out of rear vents

check the hoses going to the rear vents.

Posted on Jul 02, 2009

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bluesman1956
  • 388 Answers

SOURCE: the rear climate control/radio does

Check your owner's manual for a fuse box diagram and check the appropriate fuses. This may also be a high amp fuse that is in the fuse box under the hood. Please rate this answer, thanks.

Posted on Feb 05, 2011

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1 Answer

Rear radio in envoy not working. It will not come on at all.Front radio works fine.


This is one of those mysteries of GMC engineering. I compared the Envoy without and with rear seat radio and found 10A HVAC FUSE B 36 (!) in the rear fuse block is the source of power. Replacing it may get your radio working again.

Dec 16, 2014 | 2003 GMC Envoy

1 Answer

Raido wire diagram 2002 envoy


2002 GMC Envoy Car Stereo Wiring Chart
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: The radio harness does not provide a switched power source. Run a wire to the fusebox or ignition switch harness for switched power.
Car Radio Ground Wire: Black/White
Car Radio Illumination Wire: N/A
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

Jul 23, 2012 | 2002 GMC Envoy XL

1 Answer

How to replace rear fan resistor envoy 2003


Doesn't have a resistor. It has a blower motor control processor. When they go bad, the blower motor defaults to always on (go figure that logic). Pull the AUX blower motor fuse until you can get a replacement. The processor is located back by the rear blower motor.
Blower motor wont shut off Ricks Free Auto Repair Advice

Aug 10, 2017 | 2003 GMC Envoy

2 Answers

Where is fuse for the speakers?


2004 GMC Envoy rear speakers suddenly stopped working? Does anyone know of a resolution?

Jun 24, 2010 | 2004 GMC Envoy

1 Answer

While driving wipers, radio, turn signal, instrument panel lights, all lights on heater/ ac and other controls all stopped working. Vehicle still starts and runs but power is intermitten on some other...


This is all linked to the Body Control Module. After checking all fuses and relays, start there. Warning, it is very hard to get to, and i am not sure as to its exact location on an envoy.

Aug 04, 2009 | 2002 GMC Envoy

1 Answer

2003 Envoy intermittent display, radio, ac control, shift, comp.


This sounds like your alternator maybe going bad. When your alternator starts to go bad lights such as headlights, radio lights will go dim wipers will start to move slower but if you cut one of the things off such as the wipers the lights will get brighter for a few minutes then not long the car will shut completely down. Hope this helps.

Jul 22, 2009 | 2003 GMC Envoy Xl

1 Answer

No air coming out of rear vents


check the hoses going to the rear vents.

Jul 02, 2009 | 2004 GMC Envoy

1 Answer

Need wiring diagram for Gmc envoy stereo


I dont believe its used in your situation .

here is a rundown

Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: The radio harness does not provide a switched power source. Run a wire to the fusebox or ignition switch harness for switched power.
Car Radio Ground Wire: Black/White
Car Radio Illumination Wire: Brown
Car Stereo Dimmer Wire: Gray
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

Mar 27, 2009 | 2006 GMC Envoy

1 Answer

Rear climate control


check and see if your rear control is working for the radio, if not: that could be your problem. All of the power for the rear of the envoy is controlled by this module.

Oct 07, 2008 | 2003 GMC Envoy Xl

3 Answers

Dash Vent problem


I got the same problem. I was told it was the AC control module that goes bad and it kills the ability to blow air out the AC dash vents. My Envoy is a piece of junk, electrically speaking.

Jul 16, 2008 | 2004 GMC Envoy

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