I need a wiring diagram or fuse box diagram for 2007 GMC Envoy Denali trailer towing package problem. It's a 7 wire auxillary plug. The trailer brakes work fine, but all the lights do not come on. I don't know if it is a fuse or in the wiring. If it is a fuse, I need to know which one.
Hi there;
Here is the wiring diagram for the trailer wiring for your truck.
Hope this helps
Farrout!
Where is the fuse for the starter and the starter wiring located in this diagram.? 1007 GMC Envoy Denali.
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The problem might be related to a faulty ground on the trailer. If the lightson you envoy work, then the problem is either a bad ground or a wiring problem with the trailer hookup.
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