2021 GMC Sierra 2500HD Review

Name: 2021 GMC Sierra 2500HD Review
Brand: GMC

Price Range: $37,590 - $68,990

GMC Sierra 2500HD AT4 Crew Cab Pickup Exterior

GMC Sierra 2500HD Denali Crew Cab Pickup Shown

+481

The 2021 Sierra 2500HD is a seriously capable heavy-duty truck. The large cabin fits passengers and cargo without issue. Hauling and towing capacities are strong, just as you'd expect from a truck in this class. The available MultiPro tailgate also makes loading items into the bed easy. But a few things are holding the Sierra back, such as poor ride quality, below-average visibility, and in-cabin tech that doesn't match up with the tech in segment leaders.

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2021 GMC Sierra 2500HD Review

by the Edmunds Experts

What's new

New driver aids for towing debut
Expanded availability of safety, off-roading and utility features
Additional option packages for SLT, AT4 and Denali trim levels
Part of the fourth Sierra 2500HD generation introduced for 2020

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Reliability Ratings by RepairPal

3/5Above Average

#10 out of 19 among Fullsize Trucks

RepairPal Reliability Ratings are based on the actual cost, frequency, and severity of unscheduled repairs and maintenance on make/model data for select 2008-2022 vehicles. The reliability of a specific vehicle may vary depending on its maintenance and driving history, model year, trim, and features.

Cost

^{The average total annual cost for unscheduled repairs and maintenance across all model years of the GMC Sierra 2500HD from 2008-2022.}

$840/yr

vs. $752/yr
for Average Fullsize Truck

Frequency

^{The average number of times this model is brought into the shop for unscheduled repairs and maintenance in a single year. RepairPal calculates this metric by tracking millions of unique vehicles over multiple years to determine an average number of visits per year (omitting small routine visits, e.g., oil changes).}

0.67x/yr

vs. 0.98x/yr
for Average Fullsize Truck

Severity

^{The probability that a repair will be a major issue, meaning the repair costs 3x the average annual repair cost for all models. This threshold will be higher for vehicles that have higher labor rates and parts costs (such as a premium brand).}

22.3%

vs. 19.9%
for Average Fullsize Truck

powered by RepairPal ^{Based on RepairPal reliability data as of 8/23/2023. Ratings are provided by RepairPal and Edmunds is not responsible for their accuracy.}

GMC Sierra 2500HD Reviews

Owner Reviews

4.4

24 reviews

5(75%)

4(8%)

3(4%)

2(9%)

1(4%)

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Most Helpful Owner Reviews

Love the looks, love the power, love the economy

Rick B., 03/18/2021

2020 GMC Sierra 2500HD AT4 4dr Crew Cab 4WD SB (6.6L 8cyl 6A)

I purchased a 2020 Sierra 2500HD AT4 (Duramax) in November of 2020. This thing is a BEAST and a joy to drive. I've put almost 131K miles on it thus far and have not had a single issue. IMHO, the interior is better than a Ford but trails behind the Dodge. However, just because it seems less capable with technology isn't necessarily true. I have physical switches for many things that …

Awesome ridding truck

Jimmy Rawlings, 02/09/2021

2020 GMC Sierra 2500HD AT4 4dr Crew Cab 4WD SB (6.6L 8cyl 6A)

If you want to go from a 1/2 ton to a 3/4 ton for towing your larger than 30’ travel trailer, this is an excellent choice. The new 6.6 gas motor will give you convenience towing any bumper pull trailer. If pulling the heavier 5th wheel trailers you probably want to go with the diesel. This truck with the gas motor rides really nice towing and empty. Don’t expect 1/2 ton gas mileage. I’m …

2500 DENALI

sv, 09/29/2020

2020 GMC Sierra 2500HD Denali 4dr Crew Cab 4WD SB (6.6L 8cyl 6A)

I just traded my 18 GMC 1500 oh what a difference in ride and payload i love it wish i bought the Diesel

Emission System Issues

Robert in WY, 12/28/2021

2020 GMC Sierra 2500HD Denali 4dr Crew Cab 4WD SB (6.6L 8cyl 6A)

After 43K miles I'm selling my Year 2020, 2500 HD Denali, 6.6 l diesel. Replaced the diesel particulate filter at 20K miles for $1500. The particulate heater (burner) just died at 43K miles for another $1500. Waiting 2 weeks for parts while the truck sits. After 50K miles, I will pay these repair bills instead of GMC. i am on first name basis with service dept. No thanks. I'm out.

We have a limited number of reviews for the 2021 GMC Sierra 2500HD, so we've included reviews for other years of the Sierra 2500HD since its last redesign.

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2021 Sierra 2500HD Highlights

Type:

Crew Cab

Trim:

Base

Base MSRP Excludes Destination Fee	$40,300
Engine Type	Gas
Seating	6 seats
Drivetrain	rear wheel drive
Max Towing Capacity	18,500 lbs.
Warranty	3 years / 36,000 miles

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Safety

Our experts like the Sierra 2500HD models:

Automatic Emergency Braking: Applies hard braking in the case of a potential front collision or enhances braking initiated by the driver.
Side Blind Zone Alert: Provides alerts on the side mirror when the system detects a moving vehicle in a potential blind spot.
Rear Cross-Traffic Alert: Alerts you to cross traffic on either side when you're backing out of a parking space or driveway.

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2021 GMC Sierra 2500HD Review

Price & Payment

2021 GMC Sierra 2500HD Review

What's new

Reliability Ratings by RepairPal

Cost

Frequency

Severity

GMC Sierra 2500HD Reviews

Owner Reviews

Most Helpful Owner Reviews

Trending topics

Love the looks, love the power, love the economy

Awesome ridding truck

2500 DENALI

Emission System Issues

2021 Sierra 2500HD Highlights

Safety

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