2021
GMC Sierra 2500

Starts at:
$36,200
Shop options
New 2021 GMC Sierra 2500
See ratings
Consumer rating
Owner reviewed vehicle score
Not rated
Safety rating
NHTSA tested vehicle score
Consumer rating
Owner reviewed vehicle score
Not rated
Safety rating
NHTSA tested vehicle score
Shop Cars.com
Browse cars & save your favorites
Dealers near you
Find & contact a dealership near you
Listings near 43272
Change location See all listings

Photo & video gallery

2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500 2021 GMC Sierra 2500

The good & the bad

This vehicle doesn't have any good or bad insights yet.

Use our comparison tool to look at this model side-by-side with other vehicles or view the full specifications list .

Start your comparison

Available cars near you

See all cars near you

Factory warranties

New car program benefits

Basic
3 years / 36,000 miles
Corrosion
3 years / 36,000 miles
Powertrain
5 years / 60,000 miles
Roadside Assistance
5 years / 60,000 miles

Certified Pre-Owned program benefits

Age / mileage
5 model years or newer / up to 75,000 miles
Basic
12 months / 12,000 miles bumper-to-bumper original warranty, then may continue to 6 years / 100,000 miles limited (depending on variables)
Dealer certification
172-point inspection
See all CPO program details

Compare similiar vehicles

Select cars to compare for more detailed info.
  • 2021
    4.3
    GMC Sierra 2500
    Starts at
    $36,200
    3
    Seat capacity
    Gas V8
    Engine
    Rear-wheel drive
    Drivetrain
    3,976 lbs
    Payload Capacity
    14,500 lbs
    Towing Capacity
    Compare
  • 2023
    GMC Sierra 2500
    Starts at
    $42,200
    3
    Seat capacity
    Gas V8
    Engine
    Rear-wheel drive
    Drivetrain
    3,993 lbs
    Payload Capacity
    18,500 lbs
    Towing Capacity
    Compare
  • 2020
    4.9
    GMC Sierra 3500
    Starts at
    $37,000
    2
    Seat capacity
    Gas V8
    Engine
    Rear-wheel drive
    Drivetrain
    4,328 lbs
    Payload Capacity
    20,000 lbs
    Towing Capacity
    Compare
  • 2024
    4.5
    Chevrolet Silverado 2500
    Starts at
    $44,400
    3
    Seat capacity
    Gas V8
    Engine
    Rear-wheel drive
    Drivetrain
    4,055 lbs
    Payload Capacity
    20,000 lbs
    Towing Capacity
    Compare
Compare all vehicles

Consumer reviews

78% of drivers recommend this car
4.3 / 5
Based on 28 reviews
Write a review
Comfort 4.8
Interior 4.6
Performance 4.4
Value 4.0
Exterior 4.6
Reliability 4.1

Most recent

By Kendall from Searcy, AR
Owns this car
February 22, 2025

This thing has been a nightmare since we bought it.

This thing has been a nightmare since we bought it. We purchased it used in 24 with 100k miles. A few months later it blew a head gasket and had to have a new engine put in. Since then it's been chasing down intermittent, random check engine codes and losing coolant to which we can't find the source of. The multipro tailgate is a pain and only works half the time. Sometimes the radio freezes. "Service steering column lock" message intermittently. Clunking shifting and hesitation around 55mph. It goes on and on. Between our own pocket book and the extended warranty, over $30,000 has been spent in repairs. Yes, you read that right, 30k. Biggest piece of garbage ever.
  • Purchased a Used car
  • Used for Transporting family
  • Does not recommend this car
Comfort 5.0
Interior 5.0
Performance 3.0
Value 1.0
Exterior 5.0
Reliability 1.0
0 people out of 0 found this review helpful. Did you?
Yes No
By T Jones from Oakland Ca
Owns this car
October 24, 2023

Beautiful truck

I love my 2021 GMC Denali 2500HD. I have gotten more complements on this truck than any other vehicle that I have owned. I get great highway fuel milage average 19-26mpg,which is great for a heavy duty truck!
  • Purchased a New car
  • Used for Having fun
  • Does recommend this car
Comfort 4.0
Interior 4.0
Performance 5.0
Value 5.0
Exterior 5.0
Reliability 5.0
2 people out of 3 found this review helpful. Did you?
Yes No
See all reviews

Latest news from cars.com

ram-yukon-denali-diesel-2021--01-angle--exterior--fueling--gas-station--rear--red.jpg
Featured

462,000 GM Diesel Trucks, SUVs Recalled for Transmission Issue

Another major GM recall affecting diesel-equipped pickup trucks and SUVs involves a transmission control valve that may fail. Read more

Chevrolet Silverado, GMC Sierra HDs Recalled Over Tailgates

A recall for more than 323,200 Chevrolet Silverado and GMC Sierra HD pickups is out over the risk of unwanted tailgate openings.

Seat Belt Issue Prompts Recall of 624,200 GM Vehicles

GM is recalling approximately 624,200 Chevrolet and GMC vehicles for an issue with a front-seat seat belt bracket.
See all news

GMC dealers near you

See all GMC dealers near you

FAQ

What trim levels are available for the 2021 GMC Sierra 2500?

The 2021 GMC Sierra 2500 is available in 5 trim levels:

  • (10 styles)
  • AT4 (2 styles)
  • Denali (2 styles)
  • SLE (10 styles)
  • SLT (8 styles)

What are some similar vehicles and competitors of the 2021 GMC Sierra 2500?

The 2021 GMC Sierra 2500 compares to and/or competes against the following vehicles:

Is the 2021 GMC Sierra 2500 reliable?

The 2021 GMC Sierra 2500 has an average reliability rating of 4.1 out of 5 according to cars.com consumers. Find real-world reliability insights within consumer reviews from 2021 GMC Sierra 2500 owners.

Is the 2021 GMC Sierra 2500 a good Truck?

Below are the cars.com consumers ratings for the 2021 GMC Sierra 2500. 78.6% of drivers recommend this vehicle.

4.3 / 5
Based on 28 reviews
  • Comfort: 4.8
  • Interior: 4.6
  • Performance: 4.4
  • Value: 4.0
  • Exterior: 4.6
  • Reliability: 4.1

GMC Sierra 2500 history

Your list was successfully saved.
Your comparisons
 
 
 
 
Save list Compare