2020 GMC Sierra: Denali vs SLT Models

If you ever wondered which one to choose, Denali vs SLT trim of the full-size 2020 GMC Sierra 1500 truck, here are the pros and cons for each version. Besides these two, there are a few other models available for the pickup. Sierra is the base trim, SLE and Elevation belong to the mid-range offer, and another exclusive trim is AT4. This one is a choice for off-road adventures.


The base cab/bed configuration for the Sierra 1500 truck is Regular cabin and long box. However, neither of our upper trim levels is available with such configuration. The SLT model comes with Double can and Standard bed. Crew Cab offers both trims, and it is up to you if you will choose Standard or Short box.

2020 GMC Sierra Denali vs SLT pros and cons
2020 GMC Sierra 1500 SLT model


Both models are sharing the same engines. The base unit for the Sierra is a 4.3-liter V8. The truck also uses a new turbo-four petrol unit. SLT and Denali trim levels are available with either a 5.3-liter V8 or a 3.0-liter turbodiesel. The petrol engine produces 355 hp and 383 lb-ft of torque. An eight-speed transmission sends power to rear wheels. If you need an all-wheel drive, then a router is a 10-pace gearbox.

Duramax diesel produces the class-leading numbers. 277 horsepower is more than Ford and Ram can get from their engines. Also, a turbo-six unit is also adding 460 lb-ft of torque. A ten-speed gearbox is standard and this engine adds a special exhaust system.

The most powerful engine in the lineup, a 6.2-liter V8 is not part of the lineup if you are about to pick 2WD. With an AWD, this powertrain will bring 420 horsepower 460 lb-ft of torque.

2020 GMC Sierra 1500 Denali vs SLT
2020 GMC Sierra 1500 Denali

Denali vs SLT: Features

The company adds a trademark feature for the SLT trim. It is the MultiPro tailgate with a six-way function. GMC also offers an app for this feature. C-shaped head- and taillights are housing LED lamps. The SLT trim also offers various advanced systems, such as dual-fuel management and traction selection. Towing is a lot easier with cargo tie-downs. Leather-appointed seats are standard, as well as the heating for front buckets and steering wheel. An 8-inch screen is a center of the infotainment system. A lot of driver aid and alert accessories will make a ride safer.

Let’s see what the Denali model adds. There are most features we can find on the SLT, plus a 2-speed AutoTrac transfer case and an integrated dual exhaust system. Spray-on bedliner is standard with a logo of the special trim. Seats are ventilated seats, Bose audio, and lane change alert are things that can make your choice easier between Denali vs SLT. The rear camera and 15-inch head-up display are also differences.

2020 GMC Sierra Denali vs SLT interior

Denali vs SLT: Prices

Of course, there are prices. Denali is top of the class trim, so it is the most expensive one. Double cab SLT model costs $46,000. Crew Cab adds $2,500 and you need to invest another 3 grand for all-wheel drive. The cheapest Denali model starts at $57,000 and goes up over $70k heavily loaded. SLT can cost slightly cheaper.

What Makes 2020 GMC Sierra Denali So Special?

Build 2020 GMC Sierra models HERE

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