2020 GMC Sierra 3500HD Double Cab

What’s new

  • Completely redesigned for 2020
  • Significant improvement in maximum towing capacity
  • New trailer-towing technologies
  • New model kicks off the fourth Sierra 3500HD generation

Pros & Cons

  • Improved towing and hauling capabilities
  • Bigger cabs equipped with the latest tech
  • Numerous trailer-towing technologies to make hauling loads easier
  • Useful MultiPro tailgate, bed steps and box lighting
  • Many cabin pieces are obviously sourced from the less expensive Silverado
  • Price rises quickly with options
MSRP Starting at
$39,600

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2020 GMC Sierra 3500HD Review

For years, GMC has struggled to keep up with Ford and Ram in the heavy-duty pickup truck towing and hauling competition. Now, with the redesigned 2020 GMC Sierra 3500HD, the company fields a legitimate heavy hauler with up to 35,500 pounds of trailering capacity. That's up from a comparatively low 23,100 pounds with the previous-generation Sierra 3500HD.

You'll need the 6.6-liter Duramax diesel V8 engine to handle loads that heavy. It makes the same amount of power as it did last year, but it's married to a new Allison 10-speed automatic transmission that GMC says will help keep the Duramax within its optimal operating range. Furthermore, the Sierra 3500HD's more substantial frame plus improved cooling capacity, thanks to a larger grille and reworked air induction system, contribute to the truck's increased capability.

New technology also improves the GMC's trailering capacity. The 2020 Sierra 3500HD offers an updated ProGrade Trailering system with 15 camera views, including one that allows the driver to virtually see through a trailer for greater visibility and maneuverability. Loading the bed is easier thanks to standard corner-step bumpers and side bed steps, and the available MultiPro tailgate is the equivalent of a Swiss Army knife, supplying six configurations to assist with loading, hauling and working.

Our main issue with the Sierra 3500HD has to do with the interior. Ford and Ram have taken luxury to another level in their heavy-duty trucks, and it'd be nice to see GMC put more design effort into the Sierra's ride comfort and interior quality. But given the truck's many other strengths, it's easy to recommend if you're looking for a heavy-duty truck that's well equipped and highly capable.

Which Sierra 3500HD does Edmunds recommend?

For maximum variety, we recommend the SLE trim level. It's offered with all three cab styles, both single and dual rear-wheel axles, and both the gasoline and diesel V8 engines. The SLE trim also serves as a gateway to important comfort, convenience, safety and trailering upgrades.

2020 GMC Sierra 3500HD models

2020 GMC Sierra 3500HD buyers have numerous choices to make when selecting a truck. First, you must decide between regular, double (extended) and crew-cab styles and then determine if you require two- or four-wheel drive. Next up: the rear-axle configuration and single or dual wheels. Then you have a choice of the new standard gasoline V8 (401 horsepower, 464 lb-ft) or the 6.6-liter turbodiesel V8 engine (445 hp, 910 lb-ft). Once that's settled, you've got five trim levels available to you, ranging from the standard Sierra to the plush Sierra Denali.

As you might expect, the standard specification is light on creature comforts. This is the work truck, but it does include chrome bumpers, LED headlights, a 7-inch touchscreen display, Bluetooth, and Apple CarPlay and Android Auto smartphone integration.

Choose the SLE trim, and the Sierra 3500HD includes an integrated trailer brake controller, cruise control, power windows and remote keyless entry among other features. The SLE is also ready for OnStar and GMC connected services, including a Wi-Fi hotspot.

If you want SLT, AT4 or Denali trim, you'll need to get a crew-cab version of the Sierra 3500HD. With SLT specification, the truck includes the popular MultiPro tailgate design, as well as digital variable steering assist, upgraded trailering technologies, LED cargo bed lighting and 120-volt power outlets. Comfort improvements include leather upholstery, power-adjustable heated front seats, a heated tilt-and-telescopic steering wheel, and dual-zone automatic climate control. The Sierra 3500HD SLT also has remote engine starting.

Based on SLT trim, the Sierra 3500HD AT4 is ready for serious off-roading thanks to standard 4WD, an off-road suspension, skid plates, a locking rear differential and all-terrain tires. This version of the truck gets a unique look, along with hill start assist, hill descent control and an Off-Road driving mode. The standard head-up display includes an inclinometer, while the high-definition surround-view camera system helps to negotiate tight trails.

Luxury is the focus of the Sierra 3500HD Denali. The Denali features fancier trim, a Bose premium sound system, navigation, wireless smartphone charging, a wide 8-inch driver information center, and front and rear parking sensors. It also comes with a full suite of Driver Alert advanced driving assistance systems.


Consumer reviews

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Average user rating: 5.0 stars based on 3 total reviews

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    Features & Specs

    4dr Double Cab 4WD LB DRW features & specs
    4dr Double Cab 4WD LB DRW
    6.6L 8cyl 6A
    MSRP$43,600
    MPG N/A city / N/A hwy
    SeatingSeats 6
    Transmission6-speed shiftable automatic
    Horsepower401 hp @ 5200 rpm
    See all for sale
    SLE 4dr Double Cab 4WD LB DRW features & specs
    SLE 4dr Double Cab 4WD LB DRW
    6.6L 8cyl 6A
    MSRP$47,400
    MPG N/A city / N/A hwy
    SeatingSeats 6
    Transmission6-speed shiftable automatic
    Horsepower401 hp @ 5200 rpm
    See all for sale
    4dr Double Cab 4WD LB features & specs
    4dr Double Cab 4WD LB
    6.6L 8cyl 6A
    MSRP$42,400
    MPG N/A city / N/A hwy
    SeatingSeats 6
    Transmission6-speed shiftable automatic
    Horsepower401 hp @ 5200 rpm
    See all for sale
    SLE 4dr Double Cab 4WD LB features & specs
    SLE 4dr Double Cab 4WD LB
    6.6L 8cyl 6A
    MSRP$46,200
    MPG N/A city / N/A hwy
    SeatingSeats 6
    Transmission6-speed shiftable automatic
    Horsepower401 hp @ 5200 rpm
    See all for sale
    See all 2020 GMC Sierra 3500HD Double Cab features & specs

    Safety

    Our experts’ favorite Sierra 3500HD safety features:

    Teen Driver
    Standard programmable technology that provides parents of young drivers a driving report card after they use the vehicle.
    Automatic Emergency Braking
    Automatically brakes the vehicle to avoid a collision or to reduce speed before an unavoidable impact.
    Rear Seat Reminder
    Detects when a rear door is opened and closed during or just before a trip and helps remind you not to forget about rear occupants.

    GMC Sierra 3500HD vs. the competition

    GMC Sierra 3500HD vs. Chevrolet Silverado 3500HD

    Underneath their sheet metal, the Chevrolet Silverado 3500HD and the GMC Sierra 3500HD are the same truck with the same towing and hauling capabilities. The Chevys tend to have a little less standard equipment and a slightly lower price. Otherwise, the decision between the two comes down to styling and whether you want to pay extra for metallic paint, which the GMC requires but the Chevy doesn't.

    Compare GMC Sierra 3500HD & Chevrolet Silverado 3500HD features

    GMC Sierra 3500HD vs. Ford F-350 Super Duty

    Ford isn't standing idly by as GMC rolls out a redesigned 3500HD. For 2020, Ford gives the F-350 Super Duty new gasoline and diesel V8 engine options, a new transmission, a new Tremor off-road package, and upgraded towing technologies. The latest F-350 is also rated to tow and haul more weight, though the gulf between the GMC and the Ford is much smaller than in years past.

    Compare GMC Sierra 3500HD & Ford F-350 Super Duty features

    GMC Sierra 3500HD vs. Ram 3500

    Part of the charm of a 3500-series heavy-duty pickup is how it looks and feels like an over-the-road long-distance semi-truck. Ram's got this image down pat, with its recently re-engineered 3500HD models doing a great impression of a semi right down to the available Cummins diesel engine option. Towing and hauling capacities for these two trucks are similar.

    Compare GMC Sierra 3500HD & Ram 3500 features

    FAQ

    Is the GMC Sierra 3500HD a good car?

    The Edmunds experts tested the 2020 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 2020 GMC Sierra 3500HD?

    According to Edmunds’ car experts, here’s what’s new for the 2020 GMC Sierra 3500HD:

    • Completely redesigned for 2020
    • Significant improvement in maximum towing capacity
    • New trailer-towing technologies
    • New model kicks off the fourth Sierra 3500HD generation
    Learn more

    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 2020 GMC Sierra 3500HD a good car?

    There's a lot to consider if you're wondering whether the 2020 GMC Sierra 3500HD is a good car. Safety scores, fuel economy, cargo capacity and feature availability should all be factors in determining whether the 2020 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 2020 GMC Sierra 3500HD?

    The least-expensive 2020 GMC Sierra 3500HD is the 2020 GMC Sierra 3500HD 4dr Double Cab LB (6.6L 8cyl 6A). Including destination charge, it arrives with a Manufacturer's Suggested Retail Price (MSRP) of about $39,600.

    Other versions include:

    • 4dr Double Cab 4WD LB DRW (6.6L 8cyl 6A) which starts at $43,600
    • SLE 4dr Double Cab 4WD LB DRW (6.6L 8cyl 6A) which starts at $47,400
    • 4dr Double Cab 4WD LB (6.6L 8cyl 6A) which starts at $42,400
    • SLE 4dr Double Cab 4WD LB (6.6L 8cyl 6A) which starts at $46,200
    • SLE 4dr Double Cab LB DRW (6.6L 8cyl 6A) which starts at $44,600
    • 4dr Double Cab LB (6.6L 8cyl 6A) which starts at $39,600
    • 4dr Double Cab LB DRW (6.6L 8cyl 6A) which starts at $40,800
    • SLE 4dr Double Cab LB (6.6L 8cyl 6A) which starts at $43,400
    Learn more

    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 4dr Double Cab 4WD LB DRW (6.6L 8cyl 6A), SLE 4dr Double Cab 4WD LB DRW (6.6L 8cyl 6A), 4dr Double Cab 4WD LB (6.6L 8cyl 6A), and SLE 4dr Double Cab 4WD LB (6.6L 8cyl 6A). For a full list of Sierra 3500HD models, check out Edmunds’ Features & Specs page. Learn more

    More about the 2020 GMC Sierra 3500HD

    2020 GMC Sierra 3500HD Double Cab Overview

    The 2020 GMC Sierra 3500HD Double Cab is offered in the following styles: 4dr Double Cab 4WD LB DRW (6.6L 8cyl 6A), SLE 4dr Double Cab 4WD LB DRW (6.6L 8cyl 6A), 4dr Double Cab 4WD LB (6.6L 8cyl 6A), SLE 4dr Double Cab 4WD LB (6.6L 8cyl 6A), SLE 4dr Double Cab LB DRW (6.6L 8cyl 6A), 4dr Double Cab LB (6.6L 8cyl 6A), 4dr Double Cab LB DRW (6.6L 8cyl 6A), and SLE 4dr Double Cab LB (6.6L 8cyl 6A).

    What do people think of the 2020 GMC Sierra 3500HD Double Cab?

    Consumer ratings and reviews are also available for the 2020 GMC Sierra 3500HD Double Cab and all its trim types. Overall, Edmunds users rate the 2020 Sierra 3500HD Double Cab 5.0 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 2020 Sierra 3500HD Double Cab.

    Edmunds Expert Reviews

    Edmunds experts have compiled a robust series of ratings and reviews for the 2020 GMC Sierra 3500HD Double Cab and all model years in our database. Our rich analysis includes expert reviews and recommendations for the 2020 Sierra 3500HD Double 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 2020 GMC Sierra 3500HD Double 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 2020 GMC Sierra 3500HD Double Cab?

    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 2020 GMC Sierra 3500HD Double Cabs are available in my area?

    2020 GMC Sierra 3500HD Double 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 2020 GMC Sierra 3500HD Double Cab.

    Shop Edmunds' car, SUV, and truck listings of over 6 million vehicles to find a cheap new, used, or certified pre-owned (CPO) 2020 [object Object] Sierra 3500HD Double Cab for sale near you.

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    Find a new GMC Sierra 3500HD for sale - 4 great deals out of 7 listings starting at $12,544.

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    Why trust Edmunds?

    Edmunds has deep data on over 6 million new, used, and certified pre-owned vehicles, including all models of the 2020 GMC Sierra 3500HD Double Cab and all available trim types: Base, SLE, Base, etc. Rich, trim-level features & specs and options data tracked for the 2020 GMC Sierra 3500HD Double 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.

    Should I lease or buy a 2020 GMC Sierra 3500HD Double Cab?

    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