Both the Sierra 1500 AT4X AEV Edition and the upgraded non-AEV AT4X will be available later in the 2023 model year. GMC will also unveil a Sierra Denali EV later this year that's likely related to ...

GMC is offering a new engine breathing upgrade for the 2025 GMC Sierra 1500, opening up the 6.2L V8 with a new Performance Air Intake System.

The Performance Upgrade Package for the 2021 GMC Sierra 1500 is tagged with RPO code PDM, and was offered as an LPO-level option, which means it was delivered to and installed by the dealer ...