Question about 2002 GMC Envoy

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My headlights, (DTR) occassionally go off. A big problem at night. No warning and they come back on. What could be the problem? 2002 Envoy.

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  • GMC Master
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Your DTR light relay has gone bad, you swap it out with your radiator fan relay, they are the same type of relay. The relay are electronic and is like a voltage regulator so when you do swap the relay out, you may have a check engine light come on indicating your have an issue with your radiator fan until your replace the bad relay.
This is only a quick fix to get your lights to work again and to test to see if it's just the relay which is common to go bad. Once you have narrowed down to what ti issue is, just buy a new relay at the dealer and sorry that yes it cost more then the average relay.
The relay is going to be in your fuse distribution box in the engine bay.
Thank you for using fixya and good luck

Posted on May 31, 2010

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  • bradwill1876 Oct 14, 2011

    Where can I purchase this relay? How do I remove it, do I just pull it out? Please help.

  • Harvey N Tawatao
    Harvey N Tawatao Oct 14, 2011

    You can pick up the Relay a your Local GM deal in there Parts Department, The best place i find to save money would be the Local Salvage yard.

    Most Salvage yards sells them for around $2.00, just find a salvaged Envoy and stay safe. Good luck and keep us posted.

    Molson02536

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Molson is spot on correct. Just had this same problem, switched out relay (looks like a big fuse) 45 for 46, there's a map and key of your fusebox in your owner's manual. Lights worked.

Posted on Aug 06, 2010

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  • GMC Master
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COULD BE DRL-LIGHTS RELAY GOING BAD.

Posted on May 31, 2010

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