The 2021 GMC Sierra 2500HD Truck comes in only 1 body type: Truck. The Sierra 2500HD Truck is available in 5 different trim level options: Base, SLE, SLT, AT4, and Denali. The Base is the base trim level option, while the Denali is the highest, most expensive configuration.

Which GMC Sierra 2500HD Trim Level Should I Buy?

The GMC Sierra 2500HD is available as a regular cab, double cab, and crew cab. It can be paired with the standard 6.6-liter V8 engine or a 6.6-liter diesel V8 engine. The base Sierra 2500HD comes with standard features like a spare tire carrier, a trailering hitch, and smartphone integration. The SLE trim adds more useful features like power trailering mirrors, remote keyless entry, and the ability to control the trailer brakes from the cab.

The highest trim level available for the 2021 GMC Sierra 2500HD is the Denali model. The Denali trim adds more luxury and tech-based features like side steps on the cab, leather seating, a navigation system, a bed-view camera, and a Bose audio system. It also has more safety features like a surround-view camera system and parking sensors.

We recommend the SLT trim level for the 2021 GMC Sierra 2500HD. The SLT adds more useful features for work like all-terrain tires, a 120-volt power outlet, a backup camera with a Hitch View angle, and heated front seats. More optional safety and tech-based features can be added to the SLT trim.

AT4 Trim Review & Test Drive [Video]


Denali Trim Review & Test Drive [Video]


In this guide, we will breakdown the differences between each GMC Sierra 2500HD Truck configuration and help you determine which trim level to purchase.

What's the Difference Between 2021 GMC Sierra 2500HD Trim Levels?

Below is a table comparing some of the major features for the most popular GMC Sierra 2500HD Truck trim levels.

GMC Sierra 2500HD Invoice and Market Prices by Trim

BaseSLESLTAT4Denali
Market Price$40,633$58,697$71,500$71,525$80,612

GMC Sierra 2500HD Trims

Find the GMC Dealer in your area with the lowest price

Check Local Sierra 2500HD Prices

Top Alternatives to the GMC Sierra 2500HD

These best-in-class competitors are similar to the GMC Sierra 2500HD Truck and worth considering.

Frequently Asked Questions

What is the best GMC Sierra 2500HD trim?

We recommend the SLT trim level for the 2021 GMC Sierra 2500HD. The SLT adds more useful features for work like all-terrain tires, a 120-volt power outlet, a backup camera with a Hitch View angle, and heated front seats. More optional safety and tech-based features can be added to the SLT trim.

What are the different trim levels for a GMC Sierra 2500HD?

The GMC Sierra 2500HD Truck is available in 5 different trim level options: Base, SLE, SLT, AT4, and Denali.

What is the most basic GMC Sierra 2500HD model?

The GMC Sierra 2500HD Truck Type starts at $40,500. The Base is the base trim level option, while the Denali is the highest, most expensive configuration.

What are similar models to the GMC Sierra 2500HD Trim?

Some similar models include the Ford F-250 Super Duty, Ram Ram Pickup 2500, Chevrolet Silverado 2500HD, and Toyota Tundra.