2020 GMC Sierra 3500: raw data

Every record we hold for this vehicle, as plain tables, with nothing added. The consumer page shows the same records with the maintenance schedule, price ranges and nearby shops around them.

vehicle	2020 / gmc / sierra-3500
known issues	7 clusters (reviewed 2026-08-29)
complaints	45 on file (2019-12-12 → 2025-07-09)
recalls	8
investigations	1
fars	28 occupant deaths, crash years 2010-2024 (legacy-code)
indexed	yes
license	CC BY 4.0 (derived)

Known Issues clusters all years →

Tailgate opening while drivingLATCHES/LOCKS/LINKAGES3 complaints2024-08 → 2024-12sierra-3500-2020-tailgate-opening

11631616 The contact owns a 2020 GMC Sierra 3500. The contact stated that while towing a trailer, the tailgate unintendedly opened while making a right turn. Due to the failure, the end of the tailgate was ripped in half. Upon investigation, the contact discovered NHTSA Campaign Number
11631170 The tailgate automatically opened while I was driving. I was sure the tailgate was shut and latched properly prior to the incident
11605969 There is a current safety recall N232426400 on GMC pickups including the year of my truck. GMC is saying that my VIN is not covered by the recall. However, I have the multi-pro tailgate and it came open about 6 months ago on its own as i was backing up and it caused me to run

Rear window water intrusionVISIBILITY, STRUCTURE3 complaints2022-12 → 2025-07sierra-3500-2020-rear-window-leak

11670439 The contact owns a 2020 GMC Sierra 3500. The contact stated that while driving 45 MPH with passengers seated in the rear seats, the passengers became aware that water was entering the vehicle between the window and frame. There were no warning lights illuminated. The vehicle was
11563552 Rear sliding window is leaking water into the cabin
11497794 Rear window leaking on 2020 gmc truck due to faulty rear window seal and plastic slide. Known issue in 2020 models with a service bulletin already in place. Headliner saturated and black mold showing. Rear back liner has been saturated multiple times and gmc would not refund the

Rear axle lockup and valve body failurePOWER TRAIN15 complaints2023-01 → 2025-07sierra-3500-2020-rear-axle-lockup

11598370 driving 65mph when vehicle attempted to downshift itself for no reason when instead the rear axles locked up and made a massively loud bang as if axle fell off, let off gas, smoke pouring from rear tires, skidded about 8 feet, it released then locked up 2 more times within 30
11672242 The contact owns a 2020 GMC Sierra 3500. The contact stated that while driving at an undisclosed speed, the vehicle inadvertently went into LIMP Mode. There was no warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed that the transmission valve
11602485 driving 65mph on interstate, attempted to change lanes to pass slower vehicle and pressed upon accelerator pedal...truck violently skidded to a stop and sent me onto shoulder, many vehicles behind me swerved to avoid my vehicle. GM wont repair and says since they cant replicate

Dash power reduction with trailer brake lossELECTRICAL SYSTEM, SERVICE BRAKES4 complaints2021-05 → 2021-05sierra-3500-2020-trailer-brake-loss

11418595 The computer lite up the dash and reduced power, plus took the trailer brakes off line. This happened while loaded. To reset the system you have to pull over and turn the vehicle off. This happens 2-3 times per day. This was a problem at 600 miles. The transmission shifted from
11418617 The computer lights up dash reducing power and taking the trailer brakes away. This almost caused a wreck when the truck shut off and the brakes failed. This truck has been in the shop at least once per month trying to fix the issues, from computer and brake failure to injector
11418543 The computer malfunctions. It is available for inspection. The computer lights up and causes failure in the trailer brakes. Glenn Polk the dealership in Sanger Texas has been working on a fix but has yet to come up with one. I have spoken with General Motors Representatives

Fuel system failure causing derate or stallFUEL/PROPULSION SYSTEM4 complaints2022-03 → 2025-03sierra-3500-2020-fuel-system-derate

11648405 Def heater connection on the tank will arc and melt down causing engine derate and costly repairs. Gm know and has released a service bulletins in 2022. Bulletins N212342980. But even with bulletins done still fails. And talking todealer ships it a very common problem and there
11456331 In short, the Diesel Exhaust Fluid (DEF) reductant heater failed which requires the entire DEF tank assembly (part 85138746) to be replaced on my 2020 GMC Sierra 3500. This cause the truck to go into "limp" mode where it will not travel above 65 mph, and after another period
11627460 The contact owns a 2020 GMC Sierra 3500. The contact stated while driving approximately 60 MPH, the vehicle jerked, lost motive power, and almost stopped unintendedly. There was no warning light illuminated. The contact was able to pull into a parking lot, where the vehicle shut

Tire tread separationTIRES3 complaints2022-09 → 2023-05sierra-3500-2020-tire-tread-separation

11522434 The contact owns a 2020 GMC Sierra 3500 equipped with Goodyear Tires, Tire Line: Wrangler Trail Runner, Tire Size: LT275/65/R20), DOT Number: (NA). The contact stated that while driving approximately 40-45 MPH, the vehicle exhibited the death wobble, causing the vehicle to
11495345 Goodyear Wrangler Trailrunner AT, LT275/65R20, factory installed on a 2020 GMC Sierra Denali 3500. While traveling 60 mph pulling a fifth wheel in South Texas on a clear and dry day, the rear passenger tire unexpectedly lost its tread. As we slowed down, it completely lost tire
11482843 These tires are Good Year Wrangler Trail Runner AT size LT275/65 R20. My total mileage on these tires was 42,751. These were the original tires that were installed when the truck was purchased new. My Tires are rotated every 7,500 miles. Tire pressure is maintained at the exact

Exhaust heat damage to towed trailerPOWER TRAIN2 complaints2020-07 → 2022-09sierra-3500-2020-exhaust-heat-towing

11485406 The exhaust system is directed to the rear of the vehicle and when towing causes extreme heat to build on the item being towed, in my case a 5th wheel camper. The heat has melted the trim on my camper and is a potential fire hazard
11341106 WHILE TOWING A FIFTH WHEEL CAMPER, THE EXHAUST WAS SO HOT IT MELTED THE CAMPER DIRECTLY BEHIND IT. WAS CAUGHT IN SIDE MIRROR BEFORE ANYTHING CAUGHT ON FIRE

NHTSA complaints (summary) all years →

count	earliest_date	latest_date	crash_flagged	fire_flagged	top_components
45	2019-12-12	2025-07-09	4	2	POWER TRAIN:18; ELECTRICAL SYSTEM:9; SERVICE BRAKES:7; UNKNOWN OR OTHER:5; ENGINE:5

Recalls all years →

campaign_number	report_received_date	component	summary	consequence	remedy
20V142000	12/03/2020	LATCHES/LOCKS/LINKAGES:HOOD:LATCH	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.	If a striker wire fractures, the hood may open unexpectedly while driving, increasing the risk of a crash.	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.
20V792000	17/12/2020	SEAT BELTS	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.	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.	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 began January 26, 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.
20V446000	30/07/2020	AIR BAGS:SIDE/WINDOW:CURTAIN:INFLATOR	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.	If the diffuser separates from the inflator during deployment, RRAB performance may be degraded, increasing the risk of injury in a crash.	GM will notify owners, and dealers will replace the suspect RRAB modules, free of charge. The recall began September 3, 2020. Owners may contact Chevrolet customer service at 1-800-630-2438, Cadillac customer service at 1-800-333-4223, or Buick customer service at 1-800-521-7300. GM's number for this recall is N202305380.
19V814000	14/11/2019	SEAT BELTS:PRETENSIONER	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.	A vehicle fire could result if materials ignite inside the vehicle.	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.
20V324000	04/06/2020	STRUCTURE:BODY:HOOD	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.	If a striker wire fractures, the hood may open unexpectedly while driving, increasing the risk of a crash.	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.
24V060000	01/02/2024	LATCHES/LOCKS/LINKAGES:TAILGATE:LATCH	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.	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.	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.
24V797000	24/10/2024	POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE	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.	Rear wheel lock-up can increase the risk of a crash.	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.
26V083000	12/02/2026	POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE	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.	Rear wheel lock up increases the risk of a crash.	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.

Investigations all years →

action_number	status	subject	components	opened	closed	recall_campaign	summary
PE21010	closed	Air Bag Malfunction	AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE	2021-04-09	2023-08-24	·	On April 9, 2021, the Office of Defects Investigations (ODI) opened PE21-010 to investigate instances of air bag malfunction indicator light (MIL) illumination and potential for frontal air bag non-deployment in several vehicles manufactured by General Motors (GM). The vehicles included model year (MY) 2020 through 2021 CT4 and CT5 passenger cars, Sierra and Silverado trucks (1500/2500/3500 models), XT4 and MY 2021 Escalade, Suburban, Tahoe, Yukon SUVs.Technical Service Bulletin (TSB) 21-NA-005, issued in March 2021, addresses air bag MIL illumination with diagnostic trouble codes (DTCs) B0001

FARS occupant deaths all years →

crash_years	occupant_deaths	match_type	vpic_recovered
2010-2024	28	legacy-code	0

FARS counts every occupant death in a fatal crash, whatever the cause — it does not mean the vehicle was at fault or defective. Counts are not adjusted for how many of each vehicle are on the road.

Cite this

Derived data is CC BY 4.0. Link back to the page you used. Text and BibTeX below.

Wrench.Pro (2026). 2020 GMC Sierra 3500 vehicle data [dataset]. https://www.wrench.pro/data/vehicles/2020/gmc/sierra-3500

@misc{wrenchpro_2020_gmc_sierra_3500_2026,
  author = {Wrench.Pro},
  title = {Wrench.Pro vehicle data: 2020 GMC Sierra 3500},
  year = {2026},
  howpublished = {\url{https://www.wrench.pro/data/vehicles/2020/gmc/sierra-3500}},
  note = {Derived from NHTSA public records. CC BY 4.0.}
}

hub · known-issues · methodology · license · research (interpretation)