Massaging front seats have been introduced on the 2024 GMC Sierra HD, marking the first time the feature is offered on the heavy-duty pickup line. The massaging seats will be equipped as standard on the range-topping Denali Ultimate trim, a new trim level for the Sierra HD in the 2024 model year.
GM has assigned the following descriptions and RPO codes to the specific elements providing the massaging function.
- Driver 16-way power seat adjuster including lumbar and massage (RPO code A2X).
- Passenger 16-way power seat adjuster including lumbar and massage (RPO code A7K).
The 2024 GMC Sierra HD Denali Ultimate trim includes several other seat features as standard. The Denali Ultimate is equipped with the Driver memory feature (RPO code A45) which recalls driver presets. The driver can use this memory to set power driver seat and outside mirror positions, enabling several users of the vehicle to store their preferred adjustments for these features.
The Driver memory feature is also standard on the GMC Sierra HD’s SLT, AT4 and Denali trims. The Denali Ultimate also comes with three more seat functions as standard as shown below (with RPO codes in parentheses).
- Heated driver and front passenger seats (KA1)
- Ventilated driver and front passenger seats (KQV)
- Heated second-row outboard seats (KA6)
These three features are likewise standard on the AT4 and Denali trim levels. They are optionally available on the SLT trim as part of the SLT Convenience Package (RPO code PCY).
The 2024 GMC Sierra HD ushers in a refresh of Big Red’s heavy-duty truck nameplate. New for the model year are two new trim levels, the aforementioned Denali Ultimate and the AT4X off-road variant. Besides this pair of trim level debuts, the Sierra HD gets an exterior makeover with front bumper, fascia, and grille revisions, six new exterior colors, and other styling updates.
The interior receives a unique interior treatment for SLE and SLT trim levels, while the AT4, Denali, and Denali Ultimate trims sport a premium interior design. The interior loses the front auxiliary 12-volt power outlet (RPO code KC5) in all trim levels except the Pro, while the rear auxiliary 12-volt power outlet (RPO code KPA) is omitted from all trims.
However, GM is giving the refreshed 2024 GMC Sierra HD a lineup of new features and conveniences. These include rain-sensing wipers (RPO code CE1) on the SLT, AT4, AT4X, Denali, and Denali Ultimate trims, IntelliBeam headlamps (RPO code TQ5) on all trim levels, and standard Wireless Phone Projection (RPO code PPW) for Apple CarPlay and Android Auto.
Other new additions to the GMC Sierra HD are Adaptive Cruise Control (RPO code KSG) as a new safety feature and a gross combination weight monitoring GCW Alert system for trailering. Both will help drivers manage the 2024 model year’s increased towing capacity, with max towing figures now rated 21,900 pounds for 2500HD Crew Cab models, 22,500 pounds for 2500HD, and 36,000 pounds for 3500HD.