[DeadheadNM]

Originally Posted by Mr_Rich

I did this many years ago with my '89 K1500. It's been so long that I doubt the factory parts are still available. There was a wiring harness and relay that mounted next to the windshield washer jar on the driver's side fender. I had to open up a hole on the firewall to connect part of the harness to the fusebox. It was all done with factory parts in the factory routing locations. It was kind of tricky since the diagram is not in the same orientation as the fusebox. It works great and the battery stays charged. I'd provide pictures except for the fact that my truck is getting some paint these past couple of weeks.

Thanks Rich - I may drop by a local Chevy dealer and see what if any schematics the parts guys can produce. I'll let them know what I'm after and see what I can scare up. With the trailer package, it looks ready to go for the aux battery from GM - it may be as easy as just getting pos/neg wires and bolting the pos to the correct terminal on the fuse block under the hood. Of course life's rarely that simple....