Question about 2004 GMC Envoy
Have seen same issues with a car, 98 chevy, and others...headlights suddenly not working, a 350 model truck year?, kinda new, very well kept, for instance. Problem was with the turn signal lever having wiring associated for lots of stuff, and something wrong there. Good luck. Seems may be common for various makes to have light failure issues, intermittent or not despite all checked seeming fine. And the turn signal lever the culprit.
Posted on Nov 24, 2014
Feed supply problem somewhere ?but where ? try checking the wiring loom at the rear or as its called in american "pigs tails"
Posted on Nov 19, 2012
sounds like a fuse look under the dash panel for fuse cover look at the back of cover and check that fuseThanks for using fix ya Please rate my response thank you very much
Posted on Jan 31, 2009
theres usually a pressure switch behind the brake pedal, sometimes the plastic hex nut rattles loose and you have to retighten it.
Posted on Apr 12, 2009
need to know if your third brake light up high is working or not.if it isn't,you need to check the brake light switch on the brake pedal with a test light,one side hot all the time,the other side should turn hot when brake pedal is pushed.
Posted on Jan 19, 2010
Duralast / Relay - Headlamp
20601 Autozone: $39.99 I had the exact problem with my 2004 Envoy. You need to replace the Headlamp Relay. This is a very simple fix. The relay is located under the hood in box just above the battery. Pull the cover off of the box, look at underside of box to see layout of relays/fuses, i do not recall the exact abbrevaition used for the headlamp relay but there are only two relays in there that look like the one you need, just play with those two and you will get it. Do not take it to the shop, my wife took ours in and they charged us way to much to diagnose such a simple fix. You can test it before you buy the part by switching the relays that are the same around and seeing if your headlights work (they will). It is as simple as changing what looks like a big fuse.
Posted on Feb 24, 2010
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