SOURCE: wiring diagram or fuse box diagram-2007 GMC Envoy Denali
Hi there;
Here is the wiring diagram for the trailer wiring for your truck.
Hope this helps
Farrout!
SOURCE: Trailer light wiring harness
try http://www.etrailer.com/faq-wiring.aspx. They have very good concise information that might help.
SOURCE: factory 5 wire trailer wiring to a 4 wire flat plug
there are premade kits that will automaticaly go from 5 round to four flat connection.
SOURCE: 1990 Chevy GMC Suburban alternator wiring
Well, according to my diagrams for 88-94 models, the alternator only uses the red and brown. There are pink-black wires that power some of the sensors and solenoids but should go to a fuse marked ECM in the fuse box.
Have you tried hooking up the harness without using the pink-black wire ?
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