Hey guys, I have searched high and low for a wiring diagram for the trailer plug on my 06 GMC LBZ. I have started tracing the cable from the plug on the rear bumper forward to the front of the engine some where. Have checked the fuse panel on the driver side engine compartment (all ok). Can not get voltage to the right turn signal connector or wire. Can anyone put me on to a diagram and harness routing guide or give me a clue on where to look for this issue? Thanks in advance.... I am also looking for a oil filler tube if anyone has one....

Have you checked all the fuses. These trucks have separate fuses for the trailer circuit.

All the wiring info should be at the link below. It is a big pdf file so be patient.
http://www.gmupfitter.com/publicat/2004_BB/2003_Beyond_LD_Electric_CK.pdf

This manual is found here
http://www.gmupfitter.com/body_builder_manuals.html

http://www.gmupfitter.com/index.html

Where are these located TrailWhale?

Fuse panel is located under the access door at the end of the drivers side dash panel. Right is Fuse 21 -15AMP

ok, just checked the fuse panel (I just bought this truck) and sure enough there was a blown fuse, so......., a major thanks to you my friend and I will see to it that you get my first born......., when he gets out of jail..... LOL Thanks my man!

going elk hunting this weekend so I pluged my traveltrailer in to my 07 max no trailer brakes looked at fuse. all trailer fuses blown so I pulled out 7 pin and its all f up got a new one work fine look at your plug