How do you know if your truck has the factory 7-way wires already run to the back? My truck doesnt have the factory 7-way harness or hitch, its have aftermarket hitch and wire 6-way harness. It is a 2002 2500hd Silverado 4WD.
asked by: Matthew
On your 2002 Chevy Silverado 2500 HD, you will need to look above the spare tire for a round plug with a cap on it. I have included a picture below that shows what the plug looks like. If your truck has this plug, then it has the wiring for a 7-Way. To add a 7-Way trailer connector at the rear of the truck, you can use Pollak Replacement 7-Pole, RV-Style Trailer Connector Socket - Vehicle End, # PK11893. The factory harness from under the spare tire will plug into the back of this connector. You will probably have to remove the 6-Way already installed on the truck.
If there is no plug present above the spare tire, there should still be some wiring. If this is the case, you will need to install the Brake Controller 7 and 4 Way Installation Kit, # ETBC7. I have included an FAQ article below that explains the brake controller installation process on your truck.