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If possible, pull the horn relay, use jumper wire on switch side of relay, right side in diagram. If the horn sounds, it's not the fuse. Sometimes these diagrams don't post, for some reason? good luck
Fuse number 13 is the cigarette lighter fuse, it is in the engine compartment fuse box on your GMC Envoy. To know more about where each fuse is and what it does, follow this link: https://fuse-box.info/gmc/gmc-envoy-2002-2009-fuses-and-relay
Its common for cigarette lighters to short out and need to be replaced that's my thought they are easily replaced if you don't use it have it perminantly disconnected.
I think only the lighter and obd are on that circuit. But, the 2 amp fuse is much, much too small for the lighter, or anything else for that matter. Replace the fuse with a 30 amp fuse, and try the code reader again. If the fuse continues to blow, replace the cigarette lighter assembly.
If I remember correctly if you look at the back side of the fuse cover, it should tell you what the fuses are. Also in the owners manual in the index, under fuses, it should give you a diagram of the fuse location for the acc. outlets. Good luck. The fuse should be a 20 or 25A fuse.
Hi, I just bought an '06 Envoy XL with the same problem. Just fixed it. There is a fuse box under the rear seat on the driver's side. Look for a 20A yellow fuse towards the center line of the vehicle. Check your owners manual if you need more clarity. Change that and I think you'll find the problem solved.
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