2021 GMC Sierra 3500HD Regular Cab
MSRP range: $37,100 - $46,200 Price range reflects Base MSRP for various trim levels, not including options or fees.
2021 GMC Sierra 3500HD Regular Cab

Total MSRP | $38,695 |
---|---|
Edmunds suggests you pay | $34,875 |
What Should I Pay
2021 GMC Sierra 3500HD Review

byReese Counts
Vehicle Test Editor
Reese Counts has worked in the automotive industry since he started as an intern at Edmunds in 2015. He has written or edited thousands of car-related articles and tested and reviewed hundreds of vehicles over the course of his career.Pros
- Stout towing and hauling capabilities
- Roomy cab fitted with the latest tech
- Trailer towing technologies to make hauling loads easier
- Useful MultiPro tailgate, bed steps and box lighting
Cons
- Many cabin pieces are obviously sourced from the less expensive Silverado
- Broad hood inhibits forward visibility
- Can't quite match best-in-class towing and payload ratings
What's new
- Available wireless connectivity for Apple CarPlay and Android Auto
- More features available in the lower trim levels
- Part of the fourth Sierra 3500HD generation introduced for 2020
It really doesn't get much more capable than this. The 2021 GMC Sierra 3500HD is a truck that's made to work, even in its most well-appointed trims. It offers up to 35,000 pounds of towing capacity and more than 5,000 pounds of payload capacity when properly equipped. You'd have to search hard to find a trailer or collection of equipment too heavy for you to pull or haul with this maxed-out Sierra.
Cost to DriveCost to drive estimates for the 2021 GMC Sierra 3500HD 2dr Regular Cab 4WD LB (6.6L 8cyl 6A) and comparison vehicles are based on 15,000 miles per year (with a mix of 55% city and 45% highway driving) and energy estimates of N/A undefined in Virginia.
Monthly estimates based on costs in Virginia
Not Available
Sierra 3500HD Base
vs
$264/mo
Avg. Large Truck
Only a few trucks offer the same performance and capabilities as the Sierra 3500HD, though that doesn't make the segment any less competitive or cutthroat. The Ford F-350 Super Duty and Ram 3500 offer their own take on the heavy-duty truck formula. In our minds, the two have slightly more comfortable and better-appointed interiors, making them better to live with day to day without sacrificing performance.
There's also the Chevrolet Silverado 3500HD. It's nearly identical to the Sierra save for interior and exterior design as well as a few features and optional equipment. It could be a viable option if you want to save a little compared to the Sierra. But ultimately the Sierra 3500HD should easily satisfy if you're shopping for a massively capable pickup.
Which Sierra 3500HD does Edmunds recommend?
There are so many configurations for the Sierra 3500HD that it's difficult to narrow it down to one model. We think the SLT offers the best mix of features and engine options, though it's only available in a crew-cab configuration.
GMC Sierra 3500HD models
The GMC Sierra 3500HD is a heavy-duty full-size pickup truck. It's available in five trim levels: Sierra, SLE, SLT, AT4 and Denali. The Sierra and SLE are available in regular-cab, extended-cab (double) and crew-cab configurations, while the SLT, AT4 and Denali models are crew cab only. The Sierra 3500HD is available with a choice of a 6.6-liter gasoline V8 (401 horsepower, 464 lb-ft of torque) paired with a six-speed automatic transmission or a 6.6-liter turbocharged diesel V8 (445 hp, 910 lb-ft) mated to a 10-speed automatic transmission.
Rear-wheel drive is standard on the Sierra, SLE and SLT trims, while four-wheel drive is optional on that trio and standard on the AT4 and Denali. A dual rear-wheel option is available on certain cab and bed configurations of the Sierra to boost the truck's towing capacity.
Sierra
The base Sierra is a relatively bare-bones truck. Standard features include:
- 18-inch steel wheels
- LED headlights and taillights
- Manually adjustable trailering mirrors
- Cargo bed steps
- Locking tailgate and spare tire carrier
- 40/20/40-split front bench seat
- Vinyl seats and floor coverings
- Manual windows and door locks (regular cab)
- Trailering hitch
- 7-inch touchscreen infotainment display
- Apple CarPlay and Android Auto smartphone integration
SLE
Adds more convenience features, such as:
- 18-inch alloy wheels
- Upgraded exterior trim
- Power trailering mirrors
- Configurable (MultiPro) tailgate
- Integrated brake trailer controller (allows adjustment of a trailer's brakes from the cab)
- Cloth seats and carpeted floors
- Front underseat storage
- Cruise control
- Power door locks and windows
- Remote keyless entry
- 4.2-inch color driver information display
- Satellite radio
- Connected services including a Wi-Fi hotspot
SLT
More luxurious than the SLE, the SLT has:
- Power-folding and extending trailering mirrors
- Cargo bed lighting
- 120-volt power outlet in cargo bed
- Keyless access with push-button engine start
- Remote engine start
- Dual-zone automatic climate control
- Leather seats
- Power-adjustable driver's seat
- Heated front seats
- Heated steering wheel
- 8-inch touchscreen infotainment system display
- Wireless functionality for Apple CarPlay and Android Auto
- High-definition backup camera with hitch-view angle
AT4
Provides more off-road attitude and capability with:
- Standard four-wheel drive
- Hill descent control
- Off-road suspension tuning
- Underbody skid plates
- Body-colored bumpers
- Spray-in bedliner
- Front bucket seats with center console
- Ventilated front seats
- Heated rear outboard seats
Denali
Tops the Sierra 3500HD lineup and adds on:
- 20-inch alloy wheels
- Automatic high-beam headlights
- Chrome exterior trim
- Power-sliding rear window
- Side steps to ease cab entry and exit
- Premium leather seats
- Upgraded driver information display
- Navigation system
- Bose premium sound system
- Wireless smartphone charging
- Bed-view camera
The Denali also includes a number of safety features and driver aids, many of which are optional on other trims.
- Forward collision mitigation (warns you of an impending collision and applies the brakes in certain scenarios)
- Lane departure warning (alerts you if the vehicle begins to drift out of its lane)
- Blind-spot monitoring with rear cross-traffic alert (warns you if a vehicle is in your blind spot during a lane change or while reversing)
- Surround-view camera system (gives you a top-down view of the Sierra 3500HD and its surroundings for tight parking situations)
- Parking sensors (alert you to obstacles that may not be visible in front of or behind the vehicle when parking)

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Save as much as $3,947 with Edmunds Click on the model you’re interested in to see what Edmunds suggests you should pay to get a good deal.
2021 GMC Sierra 3500HD Regular Cab pricing
in Ashburn, VABase
6.6L 8cyl 6A
Edmunds suggests you pay$34,875
SLE
6.6L 8cyl 6A
Edmunds suggests you pay$39,848
Consumer reviews
Read what other owners think about the 2021 GMC Sierra 3500HD.
5 star reviews: 72%
4 star reviews: 0%
3 star reviews: 14%
2 star reviews: 14%
1 star reviews: 0%
Trending topics in reviews
Most helpful consumer reviews
Helpful shopping links
2021 GMC Sierra 3500HD Regular Cab Features & Specs
- Total MSRP
- $38,695
- MPG & Fuel
- Fuel Tank Capacity: 36.0 gal. capacity
- Seating
- 3 seats
- Drivetrain
- Type: rear wheel drive
- Transmission: 6-speed shiftable automatic
- Engine
- V8 cylinder
- Horsepower: 401 hp @ 5,200 rpm
- Torque: 464 lb-ft @ 4,000 rpm
- Base Engine Size: 6.6 L
- Base Engine Type: Gas
- Towing & Hauling
- Max Towing Capacity: 14,500 lbs.
- Max Payload Capacity: 4,481 lbs.
- Basic Warranty
- 3 yr./ 36,000 mi.
- Dimensions
- Length: 235.5 in. / Height: 80.9 in.
- Bed Length: 8'2”
- Overall Width without Mirrors: 81.8 in.
- Curb Weight: 6,231 lbs.

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Safety
Our experts’ favorite Sierra 3500HD safety features:
- 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.
GMC Sierra 3500HD vs. the competition

2021 GMC Sierra 3500HD

2021 Ford F-350 Super Duty
GMC Sierra 3500HD vs. Ford F-350 Super Duty
The Big Three American automakers all make heavy-duty full-size pickup trucks that offer similar levels of configurations, features and capabilities. The F-350 was introduced in 2017, so it still feels fairly fresh despite being the oldest truck in the class. We like the Ford's comfortable and spacious interior with lots of tech options.
GMC Sierra 3500HD vs. Ram 3500
The Ram 3500HD was redesigned in 2019 and has generally the same features and capabilities as its class rivals. Purely on bragging rights, you might like the Ram since its optional diesel engine is capable of producing 1,075 lb-ft of torque. But the main reason to consider the Ram is its interior. It looks and feels more premium than the GMC's.
GMC Sierra 3500HD vs. Chevrolet Silverado 3500HD
The Sierra and Silverado are mechanically identical trucks, and the only significant differences are the interior and exterior design as well as the Chevy's slightly lower base price. The GMC is available with a few features that you can't get on the Chevrolet, but overall we think the Silverado is a better value.
FAQ
Is the GMC Sierra 3500HD a good car?
The Edmunds experts tested the 2021 Sierra 3500HD both on the road and at the track. And then there's safety and reliability. Edmunds has all the latest NHTSA and IIHS crash-test scores, plus industry-leading expert and consumer reviews to help you understand what it's like to own and maintain a GMC Sierra 3500HD. Learn more
What's new in the 2021 GMC Sierra 3500HD?
According to Edmunds’ car experts, here’s what’s new for the 2021 GMC Sierra 3500HD:
- Available wireless connectivity for Apple CarPlay and Android Auto
- More features available in the lower trim levels
- Part of the fourth Sierra 3500HD generation introduced for 2020
Is the GMC Sierra 3500HD reliable?
To determine whether the GMC Sierra 3500HD is reliable, read Edmunds' authentic consumer reviews, which come from real owners and reveal what it's like to live with the Sierra 3500HD. Look for specific complaints that keep popping up in the reviews, and be sure to compare the Sierra 3500HD's average consumer rating to that of competing vehicles. Learn more
Is the 2021 GMC Sierra 3500HD a good car?
There's a lot to consider if you're wondering whether the 2021 GMC Sierra 3500HD is a good car. Safety scores, fuel economy, cargo capacity and feature availability should all be factors in determining whether the 2021 Sierra 3500HD is a good car for you. Check back soon for the official Edmunds Rating from our expert testing team Learn more
How much should I pay for a 2021 GMC Sierra 3500HD?
The least-expensive 2021 GMC Sierra 3500HD is the 2021 GMC Sierra 3500HD 2dr Regular Cab LB (6.6L 8cyl 6A). Including destination charge, it arrives with a Manufacturer's Suggested Retail Price (MSRP) of about $37,100.
Other versions include:
- 2dr Regular Cab LB (6.6L 8cyl 6A) which starts at $37,100
- 2dr Regular Cab LB DRW (6.6L 8cyl 6A) which starts at $38,300
- 2dr Regular Cab 4WD LB (6.6L 8cyl 6A) which starts at $39,900
- 2dr Regular Cab 4WD LB DRW (6.6L 8cyl 6A) which starts at $41,100
- SLE 2dr Regular Cab LB (6.6L 8cyl 6A) which starts at $42,200
- SLE 2dr Regular Cab LB DRW (6.6L 8cyl 6A) which starts at $43,400
- SLE 2dr Regular Cab 4WD LB (6.6L 8cyl 6A) which starts at $45,000
- SLE 2dr Regular Cab 4WD LB DRW (6.6L 8cyl 6A) which starts at $46,200
What are the different models of GMC Sierra 3500HD?
If you're interested in the GMC Sierra 3500HD, the next question is, which Sierra 3500HD model is right for you? Sierra 3500HD variants include 2dr Regular Cab LB (6.6L 8cyl 6A), 2dr Regular Cab LB DRW (6.6L 8cyl 6A), 2dr Regular Cab 4WD LB (6.6L 8cyl 6A), and 2dr Regular Cab 4WD LB DRW (6.6L 8cyl 6A). For a full list of Sierra 3500HD models, check out Edmunds’ Features & Specs page. Learn more
More about the 2021 GMC Sierra 3500HD
2021 GMC Sierra 3500HD Regular Cab Overview
The 2021 GMC Sierra 3500HD Regular Cab is offered in the following styles: 2dr Regular Cab 4WD LB (6.6L 8cyl 6A), SLE 2dr Regular Cab 4WD LB (6.6L 8cyl 6A), 2dr Regular Cab 4WD LB DRW (6.6L 8cyl 6A), SLE 2dr Regular Cab 4WD LB DRW (6.6L 8cyl 6A), SLE 2dr Regular Cab LB DRW (6.6L 8cyl 6A), SLE 2dr Regular Cab LB (6.6L 8cyl 6A), 2dr Regular Cab LB (6.6L 8cyl 6A), and 2dr Regular Cab LB DRW (6.6L 8cyl 6A). GMC Sierra 3500HD Regular Cab models are available with a 6.6 L-liter gas engine, with output up to 401 hp, depending on engine type. The 2021 GMC Sierra 3500HD Regular Cab comes with four wheel drive. Available transmissions include: 6-speed shiftable automatic.
What do people think of the 2021 GMC Sierra 3500HD Regular Cab?
Consumer ratings and reviews are also available for the 2021 GMC Sierra 3500HD Regular Cab and all its trim types. Overall, Edmunds users rate the 2021 Sierra 3500HD Regular Cab 4.3 on a scale of 1 to 5 stars. Edmunds consumer reviews allow users to sift through aggregated consumer reviews to understand what other drivers are saying about any vehicle in our database. Detailed rating breakdowns (including performance, comfort, value, interior, exterior design, build quality, and reliability) are available as well to provide shoppers with a comprehensive understanding of why customers like the 2021 Sierra 3500HD Regular Cab.
Pros
- Stout towing and hauling capabilities
- Roomy cab fitted with the latest tech
- Trailer towing technologies to make hauling loads easier
- Useful MultiPro tailgate, bed steps and box lighting
Cons
- Many cabin pieces are obviously sourced from the less expensive Silverado
- Broad hood inhibits forward visibility
- Can't quite match best-in-class towing and payload ratings
Edmunds Expert Reviews
Edmunds experts have compiled a robust series of ratings and reviews for the 2021 GMC Sierra 3500HD Regular Cab and all model years in our database. Our rich analysis includes expert reviews and recommendations for the 2021 Sierra 3500HD Regular Cab featuring deep dives into trim levels including Base, SLE, etc. with careful analysis around pricing, features, performance, mpg, safety, interior, and driving and performance. Edmunds also offers expert ratings, road test and performance data, long-term road tests, first-drive reviews, video reviews and more.
Read our full review of the 2021 GMC Sierra 3500HD Regular Cab here.Our Review Process
This review was written by a member of Edmunds' editorial team of expert car reviewers. Our team drives every car you can buy. We put the vehicles through rigorous testing, evaluating how they drive and comparing them in detail to their competitors.
We're also regular people like you, so we pay attention to all the different ways people use their cars every day. We want to know if there's enough room for our families and our weekend gear and whether or not our favorite drink fits in the cupholder. Our editors want to help you make the best decision on a car that fits your life.
What's a good price for a New 2021 GMC Sierra 3500HD Regular Cab?
2021 GMC Sierra 3500HD Regular Cab 2dr Regular Cab LB (6.6L 8cyl 6A)
The 2021 GMC Sierra 3500HD Regular Cab 2dr Regular Cab LB (6.6L 8cyl 6A) can be purchased for less than the Manufacturer’s Suggested Retail Price (aka MSRP) of $38,695. The average price paid for a new 2021 GMC Sierra 3500HD Regular Cab 2dr Regular Cab LB (6.6L 8cyl 6A) is trending $3,820 below the manufacturer’s MSRP.
Edmunds members save an average of $3,820 by getting upfront special offers. The estimated special offer price in your area is $34,875.
The average savings for the 2021 GMC Sierra 3500HD Regular Cab 2dr Regular Cab LB (6.6L 8cyl 6A) is 9.9% below the MSRP.
2021 GMC Sierra 3500HD Regular Cab SLE 2dr Regular Cab LB (6.6L 8cyl 6A)
The 2021 GMC Sierra 3500HD Regular Cab SLE 2dr Regular Cab LB (6.6L 8cyl 6A) can be purchased for less than the Manufacturer’s Suggested Retail Price (aka MSRP) of $43,795. The average price paid for a new 2021 GMC Sierra 3500HD Regular Cab SLE 2dr Regular Cab LB (6.6L 8cyl 6A) is trending $3,947 below the manufacturer’s MSRP.
Edmunds members save an average of $3,947 by getting upfront special offers. The estimated special offer price in your area is $39,848.
The average savings for the 2021 GMC Sierra 3500HD Regular Cab SLE 2dr Regular Cab LB (6.6L 8cyl 6A) is 9% below the MSRP.
Shop with Edmunds for perks and special offers on new cars, trucks, and SUVs near Ashburn, VA. Doing so could save you hundreds or thousands of dollars. Edmunds also provides consumer-driven dealership sales and service reviews to help you make informed decisions about what cars to buy and where to buy them.
Which 2021 GMC Sierra 3500HD Regular Cabs are available in my area?
2021 GMC Sierra 3500HD Regular Cab Listings and Inventory
Simply research the type of used car you're interested in and then select a car from our massive database to find cheap used cars for sale near you. Once you have identified a vehicle you're interested in, check the AutoCheck vehicle history reports, read dealer reviews, and find out what other owners paid for the 2021 GMC Sierra 3500HD Regular Cab.
Shop Edmunds' car, SUV, and truck listings of over 6 million vehicles to find a cheap new, used, or certified pre-owned (CPO) 2021 GMC Sierra 3500HD Regular Cab for sale near you.
Can't find a new 2021 GMC Sierra 3500HD Sierra 3500HD Regular Cab you want in your area? Consider a broader search.
Find a new GMC for sale.
Why trust Edmunds?
Edmunds has deep data on over 6 million new, used, and certified pre-owned vehicles, including all models of the 2021 GMC Sierra 3500HD Regular Cab and all available trim types: SLE, SLE, SLE, etc. Rich, trim-level features & specs and options data tracked for the 2021 GMC Sierra 3500HD Regular Cab include (but are not limited to): MSRP, available incentives and deals, average price paid, warranty information (basic, drivetrain, and maintenance), features (interior and exterior color, upholstery, bluetooth, navigation, cruise control, parking assistance, lane sensing, keyless ignition, satellite radio, folding rears seats,run flat tires, wheel type, tire size, sunroof, etc.), vehicle specifications (engine cylinder count, drivetrain, engine power, torque, engine displacement, transmission), fuel economy and MPG (city, highway, and combined, fuel capacity, range), vehicle dimensions (interior cabin space, vehicle length and width, seating capacity, cargo space). Edmunds also provides tools to allow shopper to compare vehicles to similar models of their choosing by warranty, interior features, exterior features, specifications, vehicle dimensions, consumer rating, edmunds expert review, safety rating, and color.
What is the MPG of a 2021 GMC Sierra 3500HD Regular Cab?
2021 GMC Sierra 3500HD Regular Cab 2dr Regular Cab 4WD LB (6.6L 8cyl 6A), 6-speed shiftable automatic, regular unleaded
2021 GMC Sierra 3500HD Regular Cab SLE 2dr Regular Cab 4WD LB (6.6L 8cyl 6A), 6-speed shiftable automatic, regular unleaded
2021 GMC Sierra 3500HD Regular Cab 2dr Regular Cab 4WD LB DRW (6.6L 8cyl 6A), 6-speed shiftable automatic, regular unleaded
EPA Est. MPG | N/A |
Transmission | 6-speed shiftable automatic |
Drive Train | four wheel drive |
Displacement | 6.6 L |
Passenger Volume | N/A |
Wheelbase | 141.6 in. |
Length | 235.5 in. |
Width | N/A |
Height | 80.9 in. |
Curb Weight | 6528 lbs. |
Should I lease or buy a 2021 GMC Sierra 3500HD?
Is it better to lease or buy a car? Ask most people and they'll probably tell you that car buying is the way to go. And from a financial perspective, it's true, provided you're willing to make higher monthly payments, pay off the loan in full and keep the car for a few years. Leasing, on the other hand, can be a less expensive option on a month-to-month basis. It's also good if you're someone who likes to drive a new car every three years or so.
Check out GMC lease specials
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