2021 Chevrolet Tahoe & Suburban - Key Changes

The 2021 Tahoe and Suburban are powered by V-8 engines that are among the most advanced in Chevrolet’s history, as well as an all-new Duramax turbo-diesel engine. All are matched with a new 10-speed automatic transmission with electronic shift control. A 5.3L V-8 rated at 355 horsepower (265 kilowatts) is standard on LS, LT, Z71, RST and Premier models; and a 6.2L V-8 rated at 420 horsepower (313 kW) is standard on High Country. Both feature industry-first Dynamic Fuel Management technology, with more than 12 modes of cylinder deactivation that are designed to optimize engine efficiency across a broad range of driving conditions, including when towing a trailer. The engines also feature automatic stop/start technology, direct injection and variable valve timing, which all contribute to the balance of performance and efficiency. The optional Duramax 3.0L inline-six turbo-diesel is available on all models except Z71. It is a clean-sheet engine design developed for full-size truck and SUV applications, where torque means everything for confident, on-demand power and trailering capability. The Duramax is rated at 277 horsepower (207 kW) and a strong 460 lb-ft (623 Nm) of torque. No full-size SUV competitor offers a diesel engine. It is expected to give the new SUVs some of the highest fuel economy ratings in the segment.