Question about 2003 GMC Envoy

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My 2003 gmc envoy headlights randomly go off and don't cone on wat may be causing this issue???

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  • GMC Master
  • 1,131 Answers

It's your headlight relay. Next time it goes off, switch relay #45 with relay #46, (same model relay, just for the fan). Buy a new relay, but in the mean time, clean the contacts on the relay #45 and the contacts in the fuse box, this should keep you going. I cleaned mine, and it's lasted over a year now, BUT I keep a new relay in the glovebox just in case.

By the way, we're talking about the fuse box in the engine compartment here, not the one under the rear seat.

Posted on Apr 08, 2011

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Posted on Jan 02, 2017

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