2024 GMC Sierra 2500HD AT4 Colors: Exterior Colors & Interior Colors

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2024 GMC Sierra 2500HD AT4 Colors: Exterior Colors & Interior ColorsGMC’s Sierra HD line, consisting of the Sierra 2500 HD & Sierra 3500 HD will receive a major update for 2024. The updates were announced just last week and include a brand new front fascia with new taillamps, as well as an updated interior. They also feature notable upgrades to the powertrain.

2024 GMC Sierra 2500HD AT4
2024 GMC Sierra 2500HD AT4


From bottom to top of the 2024 GMC Sierra HD’s trim line-up, there are Pro, SLE, and SLT. Then, AT4 Denali Ultimate, AT4 Denali, Denali Ultimate, AT4 Denali, AT4 Denali, AT4 Denali Ultimate. The Sierra HD AT4X will be available later in the year. Sierra AT4 HD is positioned in the middle trim, providing a good combination of heavy-duty capability and luxury.

The Sierra HD AT4 exterior features new LED Projector Headlamps, with Signature Lighting, as well as red Tow Hooks (Recovery Hooks) at the front. There is also a spray-on Bedliner, with AT4 Logo, at the back, with a GMC MultiPro Tailgate. Standard on the truck are 20-inch Gloss Black Aluminum Wheels, with BFGoodrich Off-Road Tires. The suspension system includes heavy-duty shocks and a skid plate.

The Sierra HD AT4 features a completely redesigned interior cockpit, highlighted by a 13.4-inch diagonal touchscreen center and a digital 12.3-inch-diagonal driver information center. There is a multicolor Head-Up display (HUD), 15 inches in size.

The interior features Jet Black with Kalahari Accents. It also includes a heated and wrapped steering wheel and 10-way power front leather seats.

The GMC Pro Safety suite of driver assist technologies will be standard on all 2024 GMC Sierra HDs, including the Sierra HD AT4. This includes the following features:

  • Forward Collision Alert
  • Lane Departure Alert
  • Emergency Braking
  • New for 2024: Front Pedestrian braking
  • IntelliBeam automatic high beams
  • Follow Distance Indicator
  • Pro Safety Plus will be offered as well, with additional features such as Rear Cross Traffic Braking (RCTB) and Trailer Side Blind Zone Alert.
2024 GMC Sierra 2500HD AT4 Interior
2024 GMC Sierra 2500HD AT4 Interior


The 2024 GMC Sierra HD AT4 continues to be powered by the standard 6.6L L8T naturally aspirated gasoline engine. This atmospheric V8 is still rated at 464 pound-feet of torque and 401 horsepower, with an Allison-branded 10-speed automatic transmission replacing the 6-speed in pre-refreshed models.

It’s still optional but the 6.6L turbodiesel Duramax L5P engine has been upgraded to produce more power and torque. Before the update, it produced 445 horsepower with 910 pounds-feet. This big diesel is paired with an Allison 10-speed transmission. 2024 GMC Sierra 2500HD AT4 Colors

2024 GMC Sierra 2500HD AT4 Redesign
2024 GMC Sierra 2500HD AT4 Redesign

Release Date and Price

Prices will be announced closer to production starting in the first quarter of 2023.