C. White

Once I get home from work, I’ll get OEM part numbers for the modules. Keep in mind that this is not a simple buy a harness and plug and tow. Could you acquire a harness from a salvage yard, yes you could but then you a lot more to sort out cause as with JL1, if you have park assist sensors, the the rear camera, the magnaride suspension and so on, you’d have to get a harness from a truck that has all the same RPO’s as your truck with JL1 cause those wires would for those options would be present in the harness.

For people wandering about the JL1. Most of you are claiming that your truck isn’t factory installed JL1 but you have the JL1 module beneath the bed above the spare tire. That module you are seeing is the fuel pump driver module which is mounted to a bracket onthe underside of it. For JL1 there is a K38 chassis control module that is mounted to the top side of this bracket, a K133 trailer brake power control module that’s mounted beneath it next to the fuel pump driver module. The wiring for S76 trailer brake control switch is in fact pre wired through the dash and is terminated at the X138 connector. The wires needed to control the other two modules is not there. This very well can in fact be added after the fact providing you have factory wiring schematics and the knowledge of electrical connectors to research what connectors are used and what terminals are needed for each of the various connectors you’d be pinning the needed wiring into. There’s also some GMLAN wiring that comes from the BCM and feeds the ECM, the electronic steering gear, K17 electronic brake control module, from the K17 the GMLAN terminates with a R6A resistor. Depending on your truck, this GMLAN leaves the K17 and feeds into the K19 magnetic suspension module then passes through and feeds into the K38 before termination into the R6A.