2026 GMC Sierra 3500 Problems & Complaints

Few complaints1.5× as many complaints as a typical year of the Sierra 3500 at the same age

Owners have filed 5 complaints about the 2026 GMC Sierra 3500 with the National Highway Traffic Safety Administration. That is a low number of complaints for a car on sale this long. The most reported problem area is the transmission & drivetrain (2 complaints, typically around 1,000 miles). 2 recalls cover this model year.

5complaints
2recalls
0crashes
0fires
0injuries
0deaths

Most common 2026 GMC Sierra 3500 problems

  • Transmission & drivetrain~1,000 miles
    240%
  • Wheels & tires
    240%
  • Electrical system
    120%
  • Fuel & propulsion system
    120%
  • Brakes~1,000 miles
    120%
  • Steering~4,000 miles
    120%

Share of the 5 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.

GMC Sierra 3500 complaints by model year

’97’98’99’00’01’02’03’04’05’06’07’08’09’10’11’12’13’14’15’16’17’18’19’20’21’22’23’24’25’26101219263620724241116255220914731191314135120322850175
Owner complaints per model year, GMC Sierra 3500. Colour = our verdict for that year (red: avoid, orange: caution, green: better than average, blue: too new).

Best Sierra 3500 years: 2012, 2014, 2013. Years to avoid: 2024, 2020, 2023, 2025, 2022. Compare all years →

2026 GMC Sierra 3500 recalls (2)

Fuel system, gasoline › Delivery › Fuel pump › Control/drive module

NHTSA recall 26V-129 · Mar 5, 2026 · 11,807 vehicles

General Motors, LLC (GM) is recalling certain 2025-2026 Chevrolet Silverado 3500, and GMC Sierra 3500 vehicles with gasoline engines and dual fuel tanks (RPOs L8T and N2N). The rear fuel pump may not transfer adequate fuel to the front tank, causing an engine stall.

Remedy: The vehicle's engine control module (ECM) will be updated by a dealer or through an over-the-air (OTA) update, free of charge. Owner notification letters were mailed April 8, 2026.

Equipment › Other › Owners/service/other manual

NHTSA recall 26V-114 · Feb 26, 2026 · 5,861 vehicles

General Motors has decided that certain 2027 Chevrolet Bolt EV, 2025-2026 Cadillac OPTIQ, Chevrolet Colorado, Equinox EV, GMC Canyon, 2026 Buick Enclave, Envision, Cadillac CT5, Escalade, Escalade ESV, Escalade IQ, Escalade IQL, LYRIQ, VISTIQ, Chevrolet Blazer EV, Corvette Convertible, Corvette Coupe, Corvette Convertible…

Remedy: Dealers will reset the vehicle radio, which will facilitate automatic download of the electronic owner's manual, free of charge. Owner notification letters were mailed April 16, 2026.

Frequently asked questions

Is the 2026 GMC Sierra 3500 a good car?

Based on 5 owner complaints filed with NHTSA, the 2026 Sierra 3500 rates few complaints: 1.5× as many complaints as a typical year of the Sierra 3500 at the same age. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.

What is the most common problem with the 2026 GMC Sierra 3500?

The transmission & drivetrain — 2 complaints, 40% of all complaints for this model year. Next are the wheels & tires (2) and electrical system (1).

How many recalls does the 2026 GMC Sierra 3500 have?

There are 2 recalls for the 2026 GMC Sierra 3500, the most recent from March 5, 2026 (control/drive module). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.

What are the best and worst years of the GMC Sierra 3500?

The best years by complaints, compared at the same age, are 2012, 2014 and 2013. Years to avoid or approach with caution: 2024, 2020, 2023, 2025 and 2022. See the full GMC Sierra 3500 years comparison.

At what mileage do 2026 GMC Sierra 3500 problems happen?

The median mileage reported in complaints is about 4,000 miles; 100% of problems with a recorded mileage started before 50,000 miles.

Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.