Chevrolet’s Tahoe and Suburban—the industry’s best-selling large SUVs—launch late next year with new designs, a more powerful diesel engine option available later in production and new technology enhancements designed to provide greater confidence and security behind the wheel.

2025 Tahoe Z71 (left) and 2025 Suburan High Country (right)

The refined, second-generation 3.0L inline-six turbo-diesel Duramax, launched previously on the Silverado 1500, is rated at 305 hp and 495 lb-ft of peak torque—increases of 10% and 7.6%, respectively, over the current diesel engine’s 277 horsepower and 460 lb-ft of torque.

A retuned turbo compressor, along with new, higher-flow fuel injectors, revised piston-cooling oil jets, new steel pistons and improved temperature control features with the cooling system’s Active Thermal Management contribute to the engine’s enhanced power, while new sound absorption materials and a tuned air induction system help balance its performance with quietness and improved refinement.

The diesel engine is paired with a 10-speed automatic transmission and is offered on all retail trims, including Z71 for the first time.

A 5.3L gasoline V-8 remains the standard engine for LS, LT, RST, Z71 and Premier. The 6.2L V-8 is standard on High Country and available on RST, Z71 and Premier. The new diesel engine will be available in 2025 after initial launch.