Question about 2002 GMC Envoy XL

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If strater works why do i lose power to the radio when I start my envoy

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That's normal, when you start the engine, every thing will go off till engine start's, need all the power from battery for start to work right.

Posted on Jul 19, 2010

  • bvc559 Jul 19, 2010

    If So why does my clock and everything else goes back to reset



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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.

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It can be either relay or fuse issue. Get both of them checked.

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Power outlets for 2004 gmc envoy xl intermittently work

loose connection or you are overloading outlets,if your trying to draw more than 15 amps continiously i'd reccomend fused wiring back to battery or main fuse box

Nov 20, 2017 | 2004 GMC Envoy

1 Answer

My 2004 envoy will not start. A couple nights ago the lights on the dash were going crazy on and off. I would lose power on the radio and the dash gauges would lose power (fuel, battery, water) they...

Check the connections at the battery. Loose connections or corroded connections will cause this same symptom.

It is not uncommon for side terminal batteries to also have a problem internally between the mounting button (the place that the cable end bolts to) and the internal connection to the battery.

What sounds like what is happening is the connection is good enough to power up a light load, dash lights, gauges, radio, etc, but when a heavy load is demanded the connection heats up and looses continuity.

I see this issue more on fords but I have seen a fair amount of GM's with this issue.

I’m happy to assist further over the phone at

Jul 20, 2011 | 2003 GMC Envoy

1 Answer

The strater is making a noise it a new strater

Yes, start with one, shims should have come with new starter.

Jul 09, 2010 | 1996 Chevrolet Blazer

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

2 Answers

What could be the cause of my 2008 envoy battery not charging? it may sit for one day, the next will not start.

you may have a short in the car wireing or just a dud battery,, if the altornater is leaking back that would drain the battery as well try taking off a battery lead and let the car stand for a day or so,, if it starts right up its not the battery there is a drain in the car,, but dont take off the battery if you have not got your radio coad as you will lose the radio

Feb 19, 2010 | 2002 GMC Envoy

1 Answer

I have a dead radio in my 2004 envoy. no

there may be a small inline fuse at the back of the radio will see it when you remove the radio, this is to prevent overload

Oct 07, 2009 | 2005 GMC Envoy

1 Answer


First thing I would do is replace the fuel filter. Could be clogging

Mar 25, 2009 | 2003 GMC Envoy

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