2021 GMC Sierra 1500 Diesel Review: AT4 and Denali

Diesel power is popular again among truckers. Leading manufacturers managed to meet all the standards set by EPA and now we see the new dimension of competition between the GM, Ford, and FCA. While its more popular sibling, also could be called twin, Chevy Silverado 1500 is under the spotlight, the 2021 GMC Sierra 1500 Diesel will deliver the same performance with the different styling.

Both GM twins are using the same engine created by Duramax. It is capable to deliver a huge amount of torque, which converts to high towing capacity. A diesel unit will be available on five trim levels. Definitely, two of the most impressive versions are AT4 off-road and premium Denali package.

2021 GMC Sierra 1500 Diesel at4

2021 GMC Sierra 1500 Diesel Specs

Duramax and General Motors already have a fruitful partnership. Mid-size Canyon is the best mid-size truck for towing thanks to a 2.8-liter diesel unit. Now, the manufacturer responds to the challenge by Ram 1500 and Ford F-150 and delivers turbodiesel plants for the full-size pickup.

A 3.0-liter I6 is the most powerful of all three units, creating 277 hp and 460 lb-ft of towing capacity. Converted to towing capacity, that is only 9,100 pounds. We say ‘only’, because its rivals can pull significantly more. Combined fuel economy is 26 mpg and the 2021 GMC Sierra 1500 Diesel can reach 30 mpg on the highway run. But, if you choose an all-wheel drive, the truck consumes 24 mpg combined. A ten-speed automatic transmission sends power to wheels.

2021 GMC Sierra 1500 Diesel specs

Denali Model

The highlight of the lineup is the premium package for the pickup. The 2021 GMC Sierra 1500 Diesel Denali will offer more features than any other model in the market at a reasonable price. MultiPro tailgate is the new system that still impresses the truckers. Denali package also brings dual pipes and an adaptive ride control system. But, the reason you will buy this version is a premium interior with the latest infotainment system. An eight-inch screen is a station where you control Bose audio. The company thought about safety, and Sierra Denali comes with blind-zone alert and cruise control. Optionally, you can pick a huge HUD with a rear camera mirror. The latest addition by the GM is the HD Surround Vision system for trailering.

2021 GMC Sierra 1500 Diesel denali

2021 GMC Sierra 1500 Diesel AT4

It is still not capable to compete with Ford Raptor and Toyota Tundra TRD Pro, but the 2021 GMC Sierra 1500 Diesel AT4 package can do some off-roading. The company lifts the truck by 2 inches, so you don’t have to do it in the aftermarket. Special additions for this version are Rancho shocks and off-road suspension. The truck also gets skid plates to protect its underbody. Again, dual exhaust pipes are there and the AT4 package gets the automatic locking rear differential.

A special bedliner is installed with the logo of the model. Vertical recovery hooks could be very useful in tough situations. The leather interior is making the ride more relaxed. The 2021 Sierra 1500 Diesel AT4 also offers some interesting upgrades, similar to the premium Denali. Unique additions are CarbonPro bed and MultiPro audio.

Leave a Comment