Question about 2001 GMC Sierra 2500HD
The harness was pulled away from the plug. There are 7 pins but only 6 are used. My problem is no one can tell me the wire to plug schematic.
Park/neutral position/on the transmission at the lever make sure brake on shift is neutral/its black plastic with wires comming out looks like a switch/you will see just make sure u r in neutral /and align tabs.
Posted on Jan 25, 2013
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Posted on Jan 02, 2017
As long as there is not damaged areas, and all connections are the same. Should work.
Posted on Jun 23, 2009
There is an updated resistor/connector package. Very expensive from GM, try your local NAPA or other parts supplier for a replacement
Posted on Jul 09, 2009
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Jul 18, 2015 | GMC Cars & Trucks
Right Turn & Brake
Left Turn & Brake
Green- Right Turn and Brake
Yellow- Left Turn and Brake
Brown- Tail Lights
Red- Reverse (Back Up) Lights
Blue- Electric Brakes
Purple- Auxiliary Power
It sounds like your green and yello wires are shorted together somewhere along the length of the harness. I would check the wires on the trailer first. Easier yet, if you have another trailer to connec or access to another to use for testing, connect to it and see if the problem repeats; if it does the trouble is in the vehicle's wiring.
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