The 2021 GMC diesel lineup starts with the midsize Canyon. This truck offers a 2.8L Duramax diesel engine on the Elevation, AT4, and Denali trims, starting at $39,325. This engine delivers 181 hp and 369 lb-ft of torque, allowing the Canyon to tow up to 7,700 lbs. However, the diesel is good for more than just towing. Combine it with the Canyon AT4 trim with its four-wheel-drive, automatic locking rear differential, and an off-road suspension package, and you will have the perfect-truck for off-road adventures. Put it in the top-tier Canyon Denali, and you will have premium luxury and incredible efficiency, making an ideal truck for long road trips.
Next in the diesel lineup is the Sierra 1500, which can be equipped with a diesel engine on all but the base trim. The 2021 Sierra 1500 SLE with the 3.0L Duramax diesel engine starts at $44,470. With this engine, you will enjoy 277 hp and 460 lb-ft of torque, which allows the Sierra 1500 to tow up to 9,100 lbs. The Duramax is also extremely efficient and is rated for up to 30 MPG in highway driving. The Sierra AT4 diesel, which starts at $53,890, is noticeably different from other Sierra 1500 trims thanks to its 2-inch suspension lift. The final trim option is the Denali, which starts at $57,885 with the Duramax engine.
The 2021 Sierra HD is the last in the lineup and features the same trim options as the 2021 Sierra 1500. However, unlike the Sierra 1500, the Sierra HD offers the upgrade to its 6.6L Duramax diesel engine on every trim. This means that the starting price for a 2021 Sierra HD diesel truck is just $49,510 for the base trim. With its 277 hp and 420 lb-ft of torque, the Sierra HD diesel offers best-in-class towing of 36,000 lbs, as well as best-in-class cargo bed volume of 83.5 cubic feet. These features are only enhanced by the durable Allison ten-speed transmission, which allows you to remain in the engine's power band no matter the task at hand.