The 2021 GMC Sierra HD order guide has been made available, and with it comes the introduction of several new equipment groups that weren’t available the year prior. Better still, these options will be offered on bot the 2021 Sierra 2500 HD and the 2021 Sierra 3500 HD. There’s nothing yet that rivals the mighty Ram Power Wagon or F-150 Tremor directly, but that could change in the future. Additionally, the 2021 GMC Sierra HD introduces wireless Apple CarPlay and Android Auto, as well as a new bed camera system, wheel designs, and E85 flexfuel capability for the 6.6L gasoline engine.
Below is a breakdown of four new packages available, per the order guide.
SLT Premium Package
Includes (PCY) SLT Convenience Package, (PDY) SLT Preferred Package, (PQB) Driver Alert Package I, (BVQ) 6″ rectangular, cab length Chrome assist steps and (CGN) spray-on bedliner. No substitutions to the above content.
Texas SLT Premium Package
Includes (PCY) SLT Convenience Package, (PDY) SLT Preferred Package, (PQB) Driver Alert Package I, (BVQ) 6″ rectangular, cab length Chrome assist steps, (CGN) spray-on bedliner and Texas Edition badging. No substitutions to the above content.

AT4 Premium Plus Package
includes (PDO) AT4 Preferred Package, (PQB) Driver Alert Package I, (PDJ) Driver Alert II, (PYU) 20″ (50.8 cm) machined aluminum wheels with high gloss Black accents, (CF5) power sunroof, (CWM) Technology Package and (VXW) AT4 high clearance step.
Denali Black Diamond Edition
includes (TRO) Auxiliary Trailer Camera, (PDV) MultiPro Audio System by Kicker, (BKF) front floor liners with removable carpet insert, (BKE) rear floor liners with removable carpet insert, (PTT) trailer tire pressure monitor sensors, (BRS) powerretractable assist steps with LED perimeter lighting and (RTJ) 20″ (50.8 cm) high gloss Black painted aluminum wheels.
