DNHMIKE

Well after doing some research, what I've come up with is that, the fuse box under the hood, is held together with 4 silver color bolts that are to be torque to 56 inch pounds. Mine were only maybe 10 inch pounds. There is also a green color indicator by each bolt that tells if it is tight, it's green but there not tight! I hope this helps.

So Saturday I back the truck out of the garage,do a few errands and put it back in the garage. I go out Sunday and truck is totally dead, no lights, no horn, nothing. I call GM road side, tow truck comes he hooks a jump box to it and it fires right off. After it starts there is NO code, NO warnings, the clock is the correct time, even all my radio channels are OK. So I drive it to my dealer, they take it in to check it out, after 45 minutes they come out and say they can't find anything and hand my a piece of paper, ( #13-08-166-001E Aftermarket ALDL or DLC interface devices causing multiple issues). Then they want to do a drain test on the battery, so I say OK, after another 2 hours they come back out and say everything is fine. They state that my problem is the AMP power steps that are plugged into the OBD port under the dash. I find that hard to believe, that after sitting over night the battery would go totally dead. The truck has less than 1500 miles on it and has sat for up to 4 days straight before all this and started with no problem. Any ideas?

I just did mine install in 1 hour and 20 minutes, that includes running wires from the Switches, into the engine compartment for future use. Two things to help you do this install; First, insert a long screwdriver into the hole in the rubber boot from the engine side into the cab. Do this for two reasons, one, made sure the path for the new wire is clear and unobstructed, second, while the screwdriver is installed, go into the cab and look were it is located, that way you have a idea were to look for the wire you are going to insert. Second, spray a little wire lube in the rubber boot to make the wire slide in easier. Make up a 4 wire harness and stick it in the rubber boot after you insert the power wire. You might as well extend the wires from the switches while you have everything apart.