Question about 2004 GMC Envoy

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2003 gmc envoy xl brake lights dont work

The brake lights on my 2003 envoy are not working. the tail lights are fine and bulbs are fine. The brake light bar across the top of the hatch door works fine but two rear do not. any idea what the problem is and how i can fix it?

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  • seadave11 Feb 13, 2009

    i'm having the same prob. with my 2005 sierra 1500 crew cab.

  • jones5family Feb 15, 2009

    If the tail light works but the brake light doesn't work, it probably is the module that has a circuit board. I have replaced it 2 or 3 times on my 2004 XL Envoy

  • cabradford Apr 24, 2009

    Exact same problem hatch brake light works fine but left and right do not work bulbs and all seem fine. All fuses are ok and not blown. What circuit board are you refering to? One under the hood, by the brake lights.... etc... Thanks in advance for any help you can provide or if you have been able to get yours fixed and how lol. Thanks



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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

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There is a short in the steering column. Put the tilt steering all the way up. You may even have to push it up. This will close the short. Open the cover and you will see the wire has become loose in the harness.

Posted on Oct 26, 2011

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SOURCE: 2003 gmc envoy xl brake lights dont work

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

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I have a 2005 GMC Envoy. Have tail lites but no brake lites. Third lite on top works whet brakes applied


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2003 GMC Envoy have no brake lights, only the top light on the gate works, can you help thanks


First and easiest we need to check for power going to the rear lights at the plug that goes into the tail light housing. There is a board that the lights plug into that goes bad. The Envoy uses separate brake and turn bulbs so the 3rd brake and the two side are on the same circuit.

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Brake lights won't work. tail lights do. I


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.

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no wire harness problem probably that side. also lost some fuses?

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2003 gmc envoy xl brake lights dont work


theres usually a pressure switch behind the brake pedal, sometimes the plastic hex nut rattles loose and you have to retighten it.

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