Worst 2018 GMC Sierra 3500 Problems
Top 3 most-reported issues with average mileage at failure.
Brakes
Steering Defects
Electrical Faults
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All Problems by Category
Every NHTSA complaint category for the 2018 GMC Sierra 3500.
| Component | Complaints | Crashes | Fires | Avg Mileage | Volume |
|---|---|---|---|---|---|
| Brakes | 6 | — | — | 24,689 mi | |
| Steering Defects | 3 | — | — | — | |
| Electrical Faults | 2 | — | — | — | |
| Headlight/Taillight Failures | 2 | — | — | — | |
| Electronic Stability Control | 1 | — | — | — | |
| Engine Problems | 1 | — | — | — | |
| Forward Collision Avoidance: Automatic Emergency Braking | 1 | — | — | — | |
| Transmission / Drivetrain | 1 | — | — | — | |
| Wipers & Visibility | 1 | — | — | — | |
| Visibility:Defroster/Defogger/Hvac System | 1 | — | — | — |
Search Owner Complaints
Read what owners actually reported to NHTSA for the 2018 GMC Sierra 3500. Type a keyword (e.g. “transmission”, “stalling”, “brakes”) to filter.
Recalls for 2018 GMC Sierra 3500
6 NHTSA recall campaigns affecting ~737,209 vehicles.
General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2018-2019 Chevrolet Silverado 2500, 3500, and GMC Sierra 2500, 3500 Crew Cab trucks. The left or right-side roof-rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may rupture.
General Motors, LLC (GM) is recalling certain 2017-2019 Chevrolet Silverado 2500, 3500, and GMC Sierra 2500, 3500 vehicles equipped with a dual fuel tank option. The rear fuel tank may collapse and prevent the fuel pump from transferring fuel to the front tank, resulting in an engine stall.
General Motors, LLC (GM) is recalling certain 2017-2019 Chevrolet Silverado 2500, 3500 and 2017-2019 GMC Sierra 2500 and 3500 vehicles equipped with a Duramax diesel 6.6 liter engine and an optional engine-block heater cord. An electrical short-circuit may occur in the engine-block heater cable or in the terminals that connect the heater cable to the block heater.
General Motors LLC (GM) is recalling certain 2019 Chevrolet Silverado 4500, 5500 and 6500 vehicles and 2017-2019 Chevrolet Silverado 2500 and 3500 vehicles and GMC Sierra 2500 and 3500 vehicles equipped with Duramax 6.6 liter diesel engines and an optional engine-block heater. The engine block heater cord or the terminals that connect the heater cord to the block heater may short circuit and fail.
General Motors, LLC (GM) is recalling certain 2016-2018 GMC Sierra 3500 and Chevrolet Silverado 3500 trucks equipped with gasoline engines and dual fuel tanks. The fuel-level sensor in the front tank may stick in a low-level position, allowing the rear tank to overfill the front tank.
General Motors (GM) is recalling certain 2017-2018 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 trucks. The front seat belt retractor assemblies were built with the incorrect torsion bar. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 209, "Seat Belt Assemblies."
Other GMC Sierra 3500 Years
2018 GMC Sierra 3500 — FAQ
Answers based on real NHTSA complaint and recall data for this specific model year.
Is the 2018 GMC Sierra 3500 reliable?
What are common problems with the 2018 GMC Sierra 3500?
At what mileage do problems start on the 2018 GMC Sierra 3500?
Does the 2018 GMC Sierra 3500 have any recalls?
Should I buy a 2018 GMC Sierra 3500?
Source: NHTSA (National Highway Traffic Safety Administration) complaint and recall databases, aggregated by VinItel.
Wider context: See the full GMC Sierra 3500 reliability report with year-by-year comparison and generation analysis.
Check Your Specific 2018 GMC Sierra 3500
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