VehicleVerdict

2021 GMC Sierra 1500 problems

Verdict · NHTSA data

One of the years to avoid

The 2021 GMC Sierra 1500 carries two red flags at once: 704 consumer complaints filed with NHTSA — 3.2× the Sierra 1500 norm — and an open NHTSA defect investigation (subject: Loss of motive power due to engine failure post recall remedy). It is one of the Sierra 1500 years to avoid.

The trouble concentrates in one system: engine issues account for 43% of all reports (305 of 704), far ahead of transmission at 124. In government crash testing it earned 4 of 5 NCAP stars overall.

704

NHTSA complaints

7

Recalls

4

Investigations · 2 open

7

Crash-involved

12

Fires reported

2

Injuries

0

Deaths

4

NCAP overall · of 5 stars

How does 2021 compare to other Sierra 1500 years?

Sierra 1500 NHTSA complaints by model year, 2021 highlighted1,025 complaints1994: 15 complaints1995: 3 complaints1996: 7 complaints1997: 100 complaints1998: 68 complaints1999: 182 complaints2000: 215 complaints2001: 171 complaints2002: 192 complaints2003: 210 complaints2004: 253 complaints2005: 218 complaints2006: 182 complaints2007: 310 complaints2008: 439 complaints2009: 280 complaints2010: 216 complaints2011: 362 complaints2012: 146 complaints2013: 147 complaints2014: 1,025 complaints2015: 923 complaints2016: 440 complaints2017: 472 complaints2018: 415 complaints2019: 856 complaints2020: 648 complaints2021: 704 complaints2022: 699 complaints2023: 542 complaints2024: 431 complaints2025: 141 complaints2026: 84 complaints
Sierra 1500 NHTSA complaints by model year, 2021 highlighted. Red bars are years to avoid.

See all Sierra 1500 years to avoid →

What are the most common 2021 GMC Sierra 1500 problems?

ComponentComplaintsShare
Engine30543%
Transmission12418%
Electrical System7110%
Other406%
Fuel System314%
Steering314%
Brakes223%
Driver Assistance213%
Body & Structure112%
Tires & Wheels91%
Latches & Locks91%
Suspension71%
Airbags61%
Visibility & Wipers61%
Speed Control51%
Seat Belts30%
Lighting20%
Seats10%

Does the 2021 GMC Sierra 1500 have recalls?

7 NHTSA recall campaigns on file. Recall repairs are free at franchised dealers.

26V083000TransmissionFebruary 12, 2026 · 1,055 units

Defect

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.

Consequence

Rear wheel lock up increases the risk of a crash.

Remedy

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.

25V274000EngineApril 24, 2025 · 597,571 units

Defect

General Motors LLC (GM) is recalling certain 2021-2024 Cadillac Escalade and Escalade ESV, Chevrolet Silverado 1500, Suburban, and Tahoe, GMC Sierra 1500, Yukon, and Yukon XL vehicles equipped with a 6.2L V8 gas engine. The connecting rod and/or crankshaft engine components may have manufacturing defects that can lead to engine damage and engine failure.

Consequence

Engine failure increases the risk of a crash.

Remedy

Dealers will inspect the engine, and as necessary, repair or replace the engine. For vehicles that pass inspection, dealers will add higher viscosity oil, install 6 oil fill cap, replace the oil filter, and update the owner's manual. Repairs will be performed free of charge. Owner notification letters were mailed June 18, 2025. Owners may contact Cadillac customer service at 1-800-333-4223, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is N252494000.

24V797000TransmissionOctober 24, 2024 · 463,295 units

Defect

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.

Consequence

Rear wheel lock-up can increase the risk of a crash.

Remedy

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.

21V985000Tires & WheelsDecember 16, 2021 · 626 units

Defect

General Motors (GM) is recalling certain 2019-2021 GMC Sierra 1500 and Silverado 1500 vehicles equipped with certain accessory road tires and a 17" spare tire. The 17" spare tire provided with the vehicle is not compatible for use with the accessory wheels, which can cause the anti-lock brake system (ABS) to not function properly under certain conditions.

Consequence

An ABS system that does not function properly can increase the risk of a crash.

Remedy

Dealers will provide a new 17" spare tire and wheel assembly that is compatible with the accessory wheels, free of charge. Dealers will also apply a new spare tire information label, and provide owners with an owner's manual insert clarifying which spare tire to use with the accessory road tires and with the 17" original tires. Owner notification letters were mailed February 7, 2022. Owners may contact GM customer service at 1-800-462-8782 or GMC customer service at 1-800-462-8782. GM's number for this recall is N212346510.

20V811000Seat BeltsDecember 23, 2020 · 470 units

Defect

General Motors, LLC (GM) is recalling certain 2020 Chevrolet Bolt EV and 2021 GMC Canyon and Sierra 1500, 2500 and 3500, Yukon, Yukon XL, Cadillac Escalade and Escalade ESV and Chevrolet Blazer, Camaro, Colorado, Equinox, Silverado 1500, 2500 and 3500, Suburban and Tahoe vehicles. Incorrect bolts may have been used at one or more fastening locations to secure the seat belts to the vehicle. If an incorrect bolt was used, the seat belt may not be properly attached to the vehicle.

Consequence

If a seat belt assembly is not properly attached to the vehicle, the seat belt may not properly restrain an occupant in the event of a crash, increasing the risk of injury.

Remedy

GM will notify owners, and dealers will replace the suspect bolts, free of charge. The recall began January 29, 2021. Owners may contact GMC customer service at 1-800-462-8785, Cadillac customer service at 1-800-458-8006, or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N202322230.

20V792000Seat BeltsDecember 17, 2020 · 624,216 units

Defect

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.

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.

Remedy

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.

20V684000Tires & WheelsNovember 5, 2020 · 7,516 units

Defect

General Motors LLC (GM) is recalling certain 2020 Buick Enclave, Cadillac XT5, GMC Acadia and Chevrolet Traverse vehicles and 2020-2021 Chevrolet Silverado 1500, GMC Sierra 1500 vehicles. The vehicles may have been manufactured with Continental tires that were overcured.

Consequence

Overcured tires may experience a carcass break in the sidewall resulting in a sudden air loss or could develop a belt edge separation which could lead to partial or full tread/belt loss. Either condition increases the risk of a crash.

Remedy

GM will notify owners, and dealers will inspect vehicles and replace tires that have DOT number and production mold number combinations identified by Continental, free of charge. The recall began December 17, 2020. Owners may contact GMC customer service at 1-888-988-7267, Buick customer service at 1-866-608-8080, Chevrolet customer service at 1-800-222-1020 or Cadillac customer service at 1-800-458-8006. GM's number for this recall is N202319030.

Open NHTSA investigations

RQ26001

Loss of motive power due to engine failure post recall remedy

The Office of Defects Investigation (ODI) has received 36 Vehicle Owner Questionnaires (VOQs) alleging engine failure in vehicles subject to Recall 25V274. In each VOQ, the engine had the recall remedy completed prior to the reported failure incident. Recall 25V-274 addresses vehicles equipped with a L87 6.2L V8 gas engine that experienced engine damage or failure. Recall 25V-274’s remedy includes an engine inspection.  Based on the results of the inspection the vehicle will receive an oil change to a higher viscosity oil or an engine replacement.  The complaints received allege failures of both remedies. ODI is opening this Recall Query (RQ) to assess the adequacy of the remedy for Recall 25V-274. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

EA25007

Loss of motive power due to engine failure

The Office of Defects Investigation (ODI) has received 1,157 reports of engine bearing failure failures in the L87 6.2L engine produced by General Motors (GM). Of the 1,157 reports received, 173 are outside of the scope of recall 25V-274. These engines are installed in Model Years (MY) 2019–2024 Chevrolet Silverado 1500 and GMC Sierra 1500, and 2021-2024MY Chevrolet Suburban and Tahoe, GMC Yukon/Yukon XL, and Cadillac Escalade/Escalade ESV vehicles. The subject engine failures were investigated as part of a Preliminary Evaluation (PE25001).  GM determined that these engine failures were due to multiple supplier manufacturing and quality issues. GM issued recall 25V-274 to address the supplier manufacturing and quality issues produced between March 1, 2021, and May 31, 2024. Based on the issuance of recall 25V-274, NHTSA has closed PE25001. ODI continues to receive a significant number of reports of engine failure in vehicles outside the scope of 25V-274.  This presents a potential safety risk that warrants further investigation.  ODI is opening this Engineering Analysis (EA) to further evaluate the scope and severity of the potential problem and to fully assess the potential safety-related issues of vehicles built outside the recall scope. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

Consumer complaints filed with NHTSA

Representative excerpts, cleaned of personal information. These are consumer statements, not verified defects.

“First engine blown 31,904 miles, Lifter failure. Replaced with re-manufactured engine. Second engine failure at 68,000 miles, Piston rod failure. Piston blew thru engine block and engine bay caught on fire. ”

Complaint filed with NHTSA · Engine · April 18, 2025 · fire

“While driving on the highway the engine died forcing me to change lanes to cross traffic and coast to a stop on the shoulder. It was dangerous and unexpected. It would not restart so I had to have it towed. Inspection revealed the bearings had gone bad in the engine and the engine would have to be…”

Complaint filed with NHTSA · Transmission · July 1, 2024

“RETURNED HOME AFTER SOME SHOPPING. PARKED TRUCK IN DRIVE WAY. APPROXIMATELY 5 MINUTES AFTER RETURNING HOME MY WIFE SAW TRUCK SMOKING FROM UNDER THE HOOD. WITHIN ANOTHER MINUTE OR TWO THERE WERE VISIBLE FLAMES COMING FROM THE BACK EDGE OF THE HOOD. WE CALLED 911. WITHIN 5 MINUTES THE ENTIRE FRONT…”

Complaint filed with NHTSA · Electrical System · April 17, 2021 · fire

“I have HD surround vision cameras. I was parallel parking very slowly. The back end of my truck was in so I was watching the camera to see the front right of my truck and the back left of the other vehicle. I could see both vehicles including the road between them. There was space between the…”

Complaint filed with NHTSA · Other · May 24, 2023 · crash

“Less than 5 minutes after my husband and 2 children parked the car and came inside, a neighbor walking rang our doorbell to let us know there was something on fire in our driveway. We ran to the back to find his truck engulfed in flames coming from the engine. We quickly called 911 and exited the…”

Complaint filed with NHTSA · Fuel System · February 6, 2023 · fire

2021 GMC Sierra 1500 — common questions

Is the 2021 GMC Sierra 1500 reliable?

NHTSA data argues against it: 704 complaints put the 2021 model at #4 of 33 Sierra 1500 years, and a defect investigation remains open. It is one of the Sierra 1500 years to avoid.

What are the most common 2021 Sierra 1500 problems?

According to NHTSA complaint data, the leading problem areas are engine (305 complaints), transmission (124 complaints), electrical system (71 complaints).

Does the 2021 GMC Sierra 1500 have recalls?

Yes — NHTSA lists 7 recall campaigns affecting the 2021 GMC Sierra 1500. Recall repairs are free at franchised dealers; check the VIN at nhtsa.gov/recalls to confirm the work was done.

Is the 2021 GMC Sierra 1500 under NHTSA investigation?

Yes — 2 investigations remain open (Loss of motive power due to engine failure post recall remedy). An open ODI action means NHTSA is actively assessing a possible defect.

Which GMC Sierra 1500 years should you avoid?

Based on complaint rates and open investigations, the Sierra 1500 years to avoid are 2014, 2015, 2019, 2021, 2022, 2020, 2023, 2017, 2016, 2008, 2024, 2018, 2011, 2007, 2009, 2010, 2013, 2012. The cleanest record among Sierra 1500 years belongs to 1995.

How safe is the 2021 GMC Sierra 1500?

In NHTSA's NCAP crash testing, the 2021 GMC Sierra 1500 earned an overall rating of 4 out of 5 stars.

Related

Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.

Compiled by Sharon Ben-Moshe, Founder.