saxman915

The bed has also been redesigned so I would say that it wont work. It is supposed to have shorter walls (shallower bed) to get easier access from the sides.

Mine did the same thing when my backup battery needed to be replaced. They also may have not gotten one of your battery cables on tight. Just something to check.

The info from GM says that they have HID's on the Denali. Sent from my SM-N900P using Tapatalk

I am working out of town so probably would be a few days till I see him again so I found these pics online. If you have the 5.3 and dont have the engine cover you should have and would have the dealership give you one not buy one. Sent from my SM-N900P using Tapatalk

Ill see him in next few days and get a pic Sent from my SM-N900P using Tapatalk

My dads 2014 sierra all terrain has an engine cover on it. Sent from my SM-N900P using Tapatalk

Just a suggestion but did you get a dealer installed protectant on the seats? Or have you put a leather conditioner on them? In my dads 2013 dodge with the cooled seats they all of they sudden werent working right. If you look real close all of the little holes get clogged and the air cant blow through. Sent from my SM-N900P using Tapatalk