The 2024 GMC Sierra HD introduces a mid-cycle refresh for the heavy-duty pickup, bringing styling updates, upgraded interior features and new trim levels. However, GM Authority has learned that 12-volt power outlets have been eliminated from almost all of the Sierra HD trim levels.
In the 2024 GMC Sierra HD, the front auxiliary 12-volt power outlet (RPO code KC5) will appear only in the base Pro trim, but will disappear in SLE, SLT, AT4 and Denali variants. It will also be absent in the two new trims introduced by GMC, the powerful, luxurious Denali Ultimate and the off-road oriented AT4X. The front-seat 12-volt outlet was previously standard on all 2023 GMC Sierra HD trim levels.
Meanwhile, the rear auxiliary 12-volt power outlet (RPO code KPA) is likewise absent from all 2024 GMC Sierra HD trims, though it was previously unavailable on the 2023 model-year Pro trim. This outlet was standard on 2023 SLT, AT4, and Denali trims, and optionally available on the 2023 SLE as part of the SLE Convenience Package (PCQ).
Front and rear 12-volt auxiliary power outlets were similarly eliminated from most trims of the 2024 Chevy Silverado HD. GM will continue offering household-style 400-watt, 120-volt power outlets in the 2024 GMC Sierra HD. These outlets will be located in the instrument panel and cargo bed.
The 12-volt outlet removal is part of a larger Sierra HD mid-cycle refresh rolled out in the 2024 model year. Some eagerly anticipated updates include a revamped interior for all trim levels, with luxury interior details for the SLT, AT4, and Denali trims.
The GM Sierra HD exterior receives refreshed fascia, grille, and front bumper styling this year, along with six new paint color options, including Titanium Rush Metallic, Sterling Metallic, Volcanic Red Tintcoat, Redwood Metallic, Meteorite Metallic, and Downpour Metallic. Simultaneously, GM is retiring six paint colors, namely Cayenne Red Tintcoat, Ebony Twilight Metallic, Forest Metallic, Hunter Metallic, Quicksilver Metallic, and Pacific Blue Metallic.
Additional updates include GM making Automatic Emergency Braking (RPO code UHY) standard across all trims. All trims will also receive standard IntelliBeam headlights that automatically switch high beams on or off depending on the presence of oncoming traffic. In addition, the 2024 GM Sierra HD lineup receives GCW Alert to monitor gross combination weight while towing.
GMC expects the 2024 GMC Sierra HD will steal significant sales from competitors in addition to strong purchases from highly loyal repeat customers. Start of regular production (SORP) is scheduled for February 2023.