2020 GMC Sierra 3500HD Review
Price Range: $48,998 - $59,795
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Price & Payment
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Average price: $54,386
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Price
GMC Sierra 3500HD model years
GMC Sierra 3500HD types
- Crew Cab
- Regular Cab
- Double Cab
Pros
- 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
Cons
- Many cabin pieces are obviously sourced from the less expensive Silverado
- Price rises quickly with options
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
Overview
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.
For sale near Ashburn, VA
11 listings
- $59,795fair price$610 above market
- 51,687 miles
- No accidents, 1 owner, personal use only
- 6'10” bed, 6.6l, 8cyl
- Criswell Chevrolet GMC (16 mi away)
- AWD/4WD
- Back-up camera
- Bluetooth
- Leather Seats
- Sunroof/Moonroof
Close
Located in Gaithersburg, MD
PRICE INCLUDES $800 MD'S DEALER PROCESSING FEE! Only thing in addition to the sale price is your local taxes/tags.2020 GMC Sierra 3500HD Denali Summit...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49WEY3LF121096
Stock: B260073A
Certified Pre-Owned: No
Listed since: 02-25-2026 - $51,990good price$4,297 below market
- 80,823 miles
- No accidents, 1 owner, personal use only
- 8'2” bed, 6.6l, 8cyl
- Driveway (2,353 mi away)
- Home delivery*
- AWD/4WD
- Back-up camera
- Bluetooth
- Leather Seats
- Sunroof/Moonroof
Close
Located in Eugene, OR
Rare Find,Apple CarPlay,Back-Up Camera,Blind Spot Monitor,Bluetooth,Heads-Up Display,Heated Seats,Heated Seats,Heated Seats,Heated Steering Wheel,Keyl...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49WEY4LF189083
Stock: LF189083P
Certified Pre-Owned: No
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.
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*The Manufacturer’s Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees, and optional equipment. Dealer sets final price. Click here to see all GMC vehicles’ destination freight charges.
2020 GMC Sierra 3500HD trim level differences
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. Compare the 2020 GMC Sierra 3500HD trim levels in-depth.
Which Sierra 3500HD trim 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.

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Reliability
The 2020 GMC Sierra 3500HD has a 3 years / 36,000 miles basic warranty and 8 recalls. RepairPal gives it a reliability rating of 3 out of 5, ranks it #14 out of 19 among Fullsize Trucks. Below you’ll find our owner reviews.
Reliability Rating by RepairPal
3 out of 5 stars3/5Average
#14 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
$1,061/yr
vs. $752/yr
for Average Fullsize Truck
for Average Fullsize Truck
Frequency
0.83x/yr
vs. 0.98x/yr
for Average Fullsize Truck
for Average Fullsize Truck
Severity
24.7%
vs. 19.9%
for Average Fullsize Truck
for Average Fullsize Truck
powered by RepairPal
Recalls
8 recalls foundChecking if a car has a recall is simple. Just type the car's VIN number into the NHTSA website (https://www.nhtsa.gov/recalls). If there's an unrepaired recall, you'll see it there.
If a recall shows up, just call your local car dealer. They'll know about the recall and will work with the car maker to fix it for free (if the recall happened within 10 years of the car being first sold).
- Recall Number:
- 26V083000
- Manufacturer Recall Number:
- N252516560
- Manufactured from:
- 2021-10-19 to 2022-02-28
- Number of vehicles affected:
- 1055
- Defect Description:
- General Motors, LLC is recalling certain 2020 Chevrolet Silverado 2500, 3500, GMC Sierra 2500, 3500, and 2020-2022 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles that may have been repaired incorrectly under recall 24V797. The transmission control valve may fail and cause the rear wheels to lock up.
- Defect Consequence:
- Rear wheel lock up increases the risk of a crash.
- Corrective Action:
- Dealers will inspect the vehicles and update the transmission control software, free of charge. Owner notification letters were mailed March 6, 2026. Owners may contact GMC customer service at 1-800-462-8782 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N252516560. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on February 12, 2026.
- Recall Number:
- 24V797000
- Manufacturer Recall Number:
- N242454440
- Number of vehicles affected:
- 463295
- Defect Description:
- General Motors, LLC (GM) is recalling certain 2020-2022 Chevrolet Silverado 1500, 2500, 3500, GMC Sierra 1500, 2500, 3500, 2021 Cadillac Escalade, Escalade ESV, Chevrolet Tahoe, Suburban, GMC Yukon, and Yukon XL vehicles equipped with diesel engines. The transmission control valve may fail and cause the rear wheels to lock-up.
- Defect Consequence:
- Rear wheel lock-up can increase the risk of a crash.
- Corrective Action:
- Dealers will install new transmission control module software, free of charge. GM will provide a special coverage program to cover the repair of transmissions that are identified by the remedy software as containing a defective control valve. Owner notification letters were mailed December 12, 2024. Owners may contact GM customer service at 1-888-988-7267, Cadillac customer service at 1-800-458-8006, GMC customer service at GMC 1-800-462-8782 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N242454440.
- Recall Number:
- 24V060000
- Manufacturer Recall Number:
- N232426400
- Number of vehicles affected:
- 570434
- Defect Description:
- General Motors, LLC (GM) is recalling certain 2020-2024 Chevrolet Silverado 2500, 3500, GMC Sierra 2500 and 3500 vehicles equipped with power-unlatching tailgates. The tailgate's electronic gate-release switch may short circuit due to water intrusion, which can result in the tailgate inadvertently unlatching while the vehicle is in park.
- Defect Consequence:
- An unlatched tailgate may open while driving and result in a loss of unsecured cargo, creating a road hazard and increasing the risk of a crash.
- Corrective Action:
- Owners are advised to check that the tailgate is closed and latched before driving. Dealers will replace the exterior touchpad switch assemblies, free of charge. Owner notification letters were mailed May 17, 2024. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GM's number for this recall is N232426400.
- Recall Number:
- 20V792000
- Manufacturer Recall Number:
- N202314670
- Number of vehicles affected:
- 624216
- Defect Description:
- General Motors, LLC (GM) is recalling certain 2019-2021 Chevrolet Silverado 1500 and GMC Sierra 1500, 2021 Chevrolet Suburban and Tahoe and GMC Yukon XL and 2020-2021 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles. The seat belt brackets may not be secured to the seat frame in the front-row center seating position.
- Defect Consequence:
- If a seat-belt bracket is not secured, the seat belt may not properly restrain an occupant in the front-row center seat position, increasing the risk of injury in a crash.
- Corrective Action:
- GM will notify owners, and dealers will inspect left-side and right-side front-row center seat-belt bracket attachments and reassemble it correctly as necessary, free of charge. The recall is expected to begin February 1, 2021. Owners may contact GMC customer service at 1-800-462-8782, Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N202314670.
- Recall Number:
- 20V446000
- Manufacturer Recall Number:
- N202305380
- Number of vehicles affected:
- 769
- Defect Description:
- General Motors, LLC. (GM) is recalling certain 2020 Buick Enclave, Cadillac XT5 and XT6, Chevrolet Blazer, Silverado 1500, 2500 and 3500 and Traverse and GMC Acadia and Sierra 1500, 2500 and 3500 vehicles. The diffuser component of the Roof-Rail Air Bag (RRAB) inflator may not have been properly crimped to the inflator and could separate from the inflator during air bag deployment.
- Defect Consequence:
- If the diffuser separates from the inflator during deployment, RRAB performance may be degraded, increasing the risk of injury in a crash.
- Corrective Action:
- GM will notify owners, and dealers will replace the suspect RRAB modules, free of charge. The recall is expected to begin September 14, 2020. Owners may contact GM customer service at 1-866-522-9559. GM's number for this recall is N202305380.
- Recall Number:
- 20V324000
- Manufacturer Recall Number:
- N202306490
- Number of vehicles affected:
- 272
- Defect Description:
- General Motors LLC (GM) is recalling certain 2020 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles previously recalled under 20V-142. Some of the vehicles in 20V-324 were not part of Recall 20V-142 but received defect parts during another service (typically during collision repair). The hood-latch striker wires on replacement hoods installed for Safety Recall 20V-142 may not have been heat-treated properly, possibly causing them to fracture.
- Defect Consequence:
- If a striker wire fractures, the hood may open unexpectedly while driving, increasing the risk of a crash.
- Corrective Action:
- GM will notify owners, and dealers will replace the hood assembly, free of charge. For hoods sold over the counter, dealers will contact customers with instructions for hood replacement. The recall began July 7, 2020. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-888-988-7267. GM's number for this recall is N202306490.
- Recall Number:
- 20V142000
- Manufacturer Recall Number:
- N192284960
- Number of vehicles affected:
- 1909
- Defect Description:
- General Motors LLC (GM) is recalling certain 2020 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles. The hood-latch striker wires may not have been heat-treated properly, possibly causing them to fracture.
- Defect Consequence:
- If a striker wire fractures, the hood may open unexpectedly while driving, increasing the risk of a crash.
- Corrective Action:
- GM will notify owners, and dealers will replace the hood assembly, free of charge. The recall began April 13, 2020. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-888-988-7267. GM's number for this recall is N192284960.
- Recall Number:
- 19V814000
- Manufacturer Recall Number:
- N192270600
- Manufactured from:
- 2018-03-02 to 2019-10-28
- Number of vehicles affected:
- 556399
- Defect Description:
- General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500, and 2020 Silverado 2500, Silverado 3500, Sierra 2500, and Sierra 3500 vehicles equipped with carpet floor covering. When the front seat belt pretensioners deploy, hot gas may vent through an opening in the pretensioner bracket, possibly igniting the carpet.
- Defect Consequence:
- A vehicle fire could result if materials ignite inside the vehicle.
- Corrective Action:
- GM will notify owners, and dealers will close off the opening in the pretensioner bracket, free of charge. The recall began December 13, 2019. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-888-988-7267. GM's number for this recall is N192270600.
Warranty
3 years / 36,000 miles Basic Warranty- Basic Warranty
- 3 years / 36,000 miles
- Drivetrain Warranty
- 5 years / 60,000 miles
- Rust Warranty
- 6 years / 100,000 miles
- Roadside assistance Warranty
- 5 years / 60,000 miles
- Free maintenance Warranty
- 1 years / unlimited miles
GMC Sierra 3500HD Reviews
Owner Reviews
5(80%)
4(0%)
3(10%)
2(10%)
1(0%)
Most Helpful Owner Reviews
Trending topics
WHAT A TRUCK
5 out of 5 starsBill S., 04/06/2020
2020 GMC Sierra 3500HD Denali 4dr Crew Cab 4WD SB (6.6L 8cyl 6A)
I purchased this Denali two weeks ago. I absolutely love this truck. The ride is so smooth and power band is incredible. What a huge difference between my 2008 GMC 2500HD Duramax, its like night and day... I love all the high tech features with the 2020's from the cameras to the front and rear LED lighting. Oh yea forgot about that first of its kind tailgate. Now that's a very … useful tailgate, I can see Ford, Dodge and Chevrolet using the same basic tailgate in the near future.
I really cant wait to haul my 5th wheel with this truck. Once I make that first trip I will update this review regarding the towing...
A big thank you for Thompsons GMC in Placerville, CA for such a great purchasing experience.
It’s been about a year since I purchased my GMC 3500 Denali and wanted to update my review.
I still love this truck so much. I’ve towed my 5th wheel RV approximately 8000K miles. This truck tows my 5th wheel like a dream. The cooling system is definitely a 100% improvement over my 2008 while towing in the warmer weather.
About the only thing I’d like to see is GM add more information to the heads up display (HUD) like your blind spot indicators.
I’m glad we bought when we did because I hear that dealers are having a tough time receiving new trucks.
Bottom line is this, I’d buy this truck all over again absolutely No Regrets!!!!
Heavy Duty tuxedo surpassed expecations
5 out of 5 starsCorey, 08/30/2020
2020 GMC Sierra 3500HD Denali 4dr Crew Cab 4WD SB (6.6L 8cyl 6A)
In my 3rd year of owning the new 2020 GMC 3500 HD Denali after replacing my 2012 F250. Choose the GMC because I did not care for the new Ford styling. I still can not believe this is a HD 3500. While commuting around town, I think I am in my wife's German SUV because the ride and amenities are excellent. Visibility and Camera system are great and the interior seats comfortable and … supportive. When I hooked up the 3x axle boat and set out to the lake I was amazed at the poise and power. It made towing enjoyable! I really like my F250, but this truck is awesome.
Incredible
5 out of 5 starsRon, 03/13/2020
2020 GMC Sierra 3500HD Denali 4dr Crew Cab 4WD LB DRW (6.6L 8cyl 6A)
After waiting for several months and production delays I was finally able to get my hands on a 2020 3500 Denali DRW and I have to say that this truck was well worth the wait. It drives smoother than any truck I've ever owned and the safety features are incredible. I have absolutely no complaints and with it being a Denali there really isn't any more stuff I will need to add. (other than … a fifth wheel hitch) I love the 10 speed transmission and the 6.6 diesel has more than enough HP and torque.
GMC hit it out of the park!
Trailer issues
2 out of 5 starsMario, 09/13/2021
2020 GMC Sierra 3500HD Denali 4dr Crew Cab 4WD LB DRW (6.6L 8cyl 6A)
Extremely disappointed with my 2020 Denali 3500hd. I own 6 trailers and only 1 works with the "new" trailer integration system. I get trailer not connected display, brake lockup on connecting, flickering lights. Trailers work perfect on other rigs. GM dealership basically said to pound sand and update my trailers to work with their system.
2020 Sierra 3500HD Features & Specs
Crew Cab
Base
| MSRP (New) Excludes Destination Fee | $41,200 |
|---|---|
| Engine Type | Gas |
| Seating | 6 seats |
rear wheel drive | |
| Max Towing Capacity | 20,000 lbs. |
| Warranty | 3 years / 36,000 miles |
Safety
Our experts like the Sierra 3500HD models:
- 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.
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