I don’t know if this applies to your setup. I have the GM High Performance option on my GMC Sierra 1500 with the 6.2. It required a reprogram of the ECU at the time of installation. The reprogram comes with the package. It adjusts the ECU for the increase in air intake.
A little over a year and mine started leaking also. Dealer said frame was warped, order replacement. Ordered on Monday, came in on Friday. Going in on Monday to have it installed.
Well add me to the leaking rear sliding window. Took it in to the dealer on Monday. He confirmed cracked frame on driver side corner of the frame. Ordered a replacement on Monday and it is supposed to arrive tomorrow. Service Advisor said bring truck in on Monday to have it installed. I will post an update on how it goes and the window part number installed.
I have a 2019 GMC Sierra Denali Ultimate with the 6.2L engine with the 6’ 6” bed. Love the truck. I plan on doing a lot of traveling since I have retired. Would love to have a larger fuel tank. Has anyone looked to see if the 36 gallon tank from the 2500 HD would fit on our trucks.
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