Question about 2003 GMC Envoy

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Brakelights are not working, only the high brake light works

My two brakelights on my 03 GMC Envoy have quit working. The third light is still functioning. Any suggestions on how to get to the bulbs in the rear lamps or what might be the problem?

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  • rvs196t8 May 10, 2009

    There are no screws with a plastic panel on both sides on the inside covering over the access to the lamps. Is there a trick to pulling the panels loose?




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First thing to check is fuses, i know one lamp works, but maybe the two main lamps have their own fuse, doesn't hurt to check.

Getting at the bulbs is easy, open your rear hatch (door) and you will see a few screws holding each rear lamp in place, once all screws are removed the lamp needs to be carefully pulled out, there will be some sort of clip or clips holding it in place, so don't just yank it off, slowly pull on it until loose.

It's a good safety precaution to disconnect your battery just in case. Then to remove the bulb, normally its a quarter or half turn and the bulb comes right out for you to look at. You can use a multimeter, and (with battery connected) turn lights on and see if there is power at the bulb. if there is replace the bulb. if not, then you have other issues; wiring, fuses ... could be many different things.

I hope this helps you. Sometimes you can see the filament in the bulb is broken, but a lot of the time the bulb can look fine but have a broken connection (aka an Open) elsewhere in the bulb. Get a battery and wires, connect them to the bulb, see if you can get light.


Posted on May 10, 2009


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