Having problems with your 2004 GMC Envoy ?
2004 GMC envoy headlights not working - 2004 GMC Envoy
If problem is just the low beams, check fuses #3 & #6 in the under hood fuse panel, also relay #46 (in the same fuse panel) is a likely suspect part.
Check the lens it's self I unplugged the the whole headlight and when I plug if back in a prong push out of and lens. I fix it with needle nose pliers then plug it back in it work fine
Repair Help & Product Troubleshooting for 2004 GMC Envoy
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