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Trailer Wiring Harness Installation - 2003 GMC Savana Van

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How to Install a Trailer Wiring Harness on a 2003 GMC Savana Van

Today on this 2003 GMC Savana Van we are going to be installing tow package wiring harness part number 118240. The tow package port on this GMC Savana is located inside the rear cargo area behind the interior panel here on the passenger side. We need to remove a few fasteners here to gain access to it, there are a few buttons here that are covering the fasteners. We just want to take a screwdriver and pop those off. You should be able to gain access by removing just these two fasteners, but if need be you can remove the third one up top here. :29

With the buttons popped off there is a Phillips head screw that is holding it in place. With the fasteners removed we just want to pop the panel back, and if you follow inside here, right around the corner is the port we are looking for. It is down towards the bottom near the floor, and is a green plug. With the port located we just want to take our wiring harness and plug it in line. We have not only the port here, but also a white wire with a ring terminal on it. That is going to be our ground wire. We are going to have to ground it to the inside of the vehicle here. 1:07

I am going to go ahead and plug the harness in. If you follow the harness up, there is actually a cross member that we can go ahead and ground our ground wire to. We are going to take our self tapping screw that is provided with the wiring harness and secure that to the cross member. With that secured we can go ahead and pull our 4-pole out from underneath the panel. Its going to stay stored inside the vehicle when not in use. We can go ahead and install our side panel. With the panel reinstalled I can show you how to route the harness. We just want to pull it out the cargo doors, the weather stripping underneath will prevent it from being pinched. That will conclude the installation of tow package wiring harness part number 118240 on a 2003 GMC Savana Van.

Info for this part was:

Employee Andrew K
Video Edited:
Andrew K

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