Zac Quinn 
After Chevrolet announced updates to the 2024 Silverado 1500, GMC confirmed mechanically identical changes coming to the 2024 Sierra, including making the second-generation 3.0L LZ0 Duramax inline-six turbodiesel engine standard on its hardcore Sierra 1500 AT4X trim, allowing customers to go further and explore more in their off-road adventures.
2024 GMC Sierra 1500 Updates: Official Details
First introduced on select 2023 Sierra 1500 trims, the updated 3.0L LZ0 Duramax engine comes standard with a 10-speed automatic transmission and delivers max power of 305 horsepower (a 10% increase compared to the LM2) and max torque of 495 lb-ft (a 7.6% increase from LM2). The Duramax Turbo-Diesel engine’s advancements are made possible through several key component upgrades. New steel pistons with a revised combustion bowl, a retuned turbo compressor, new fuel injectors, and improved temperature control features. The Duramax engine will continue to be assembled at GM’s Flint Engine Operations plant in Michigan, and will be available on the 2024 GMC Sierra 1500 AT4X later this summer, as well as the even more potent Sierra AT4X AEV Edition.
The Sierra 1500 AT4X allows customers to venture further off-road confidently and comfortably. Standard features such as Multimatic DSSV dampers, front and rear e-locking differentials, combined with the additional capability of the available AEV edition, make this the most off-road capable factory Sierra 1500 ever. All with the luxury-focused and tech-infused AT4X Obsidian Rush interior, which features full grain leather-wrapped massaging front seats, authentic ash wood trim, a 12-speaker Bose Premium Series audio system, and more than 40 diagonal inches of combined digital displays.
Other new features coming to the 2024 model year across the Sierra 1500 lineup include:
- New power-retractable assist steps on Denali, Denali Ultimate, AT4, and AT4X
- Available active exhaust for Denali, Denali Ultimate, AT4, AT4X, and SLT
- Two additional premium aluminum wheels
- Two new unique and bold exterior paint colors, Downpour Metallic and Thunderstorm Gray
Finally, for the 2024 model year, the 2.7L Turbo High-Output Engine will now carry the name TurboMax. With 310 hp, a best-in-class standard torque rating of 430 lb-ft, and max available towing of 9,500 lbs, the TurboMax engine provides GMC Sierra 1500 Elevation, SLE, and Pro customers with the power and capability necessary to take their work or hobbies further, whether that’s towing gear or tackling off-road trails.
