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#BS-2021-GMCSIE-55F32021 Gmc Sierra 3500
Based on reports from 27 owners and 5 recalls for this exact model.
Preliminary Verdict
Green Light
Based on 27 complaints, 0 crashes, 0 fires, and 5 recalls.
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Mechanic Inspection Checklist
7 owners reported drivetrain issues — failures commonly reported around 70K miles.
30,000-Mile Cost Projection
Best Case
Most Likely
Worst Case
Top cost driver: Drivetrain (7 reports).
Also in your report
Owner Intelligence
AI-synthesized themes from real complaints
Buyer Lot Checklist
Questions, test drive checks, walk-away triggers
Negotiation Talking Points
Data-backed dollar deductions
Buy / Skip Verdict
Final recommendation with conditions
Where the complaints fall
2021 Gmc Sierra 3500: Known Issues & Problem Areas
Drivetrain Issues
Drivetrain complaints account for 26% of all reports filed for the 2021 Gmc Sierra 3500, with 7 owners filing complaints with NHTSA. The median mileage at time of complaint is 70,000 miles, suggesting issues tend to surface around the 70K-mile mark.
Brakes Issues
Brakes complaints account for 15% of all reports filed for the 2021 Gmc Sierra 3500, with 4 owners filing complaints with NHTSA. Owners should pay attention to brakes-related symptoms during test drives and pre-purchase inspections.
Electrical Issues
Electrical complaints account for 15% of all reports filed for the 2021 Gmc Sierra 3500, with 4 owners filing complaints with NHTSA. Owners should pay attention to electrical-related symptoms during test drives and pre-purchase inspections.
Engine Issues
Engine complaints account for 11% of all reports filed for the 2021 Gmc Sierra 3500, with 3 owners filing complaints with NHTSA. Owners should pay attention to engine-related symptoms during test drives and pre-purchase inspections.
Data sourced from NHTSA owner complaints and community reports. The full report analyzes severity, repair costs, and failure patterns for each category.
Complaint trend by year
Complaints filed with NHTSA by year for the 2021 Gmc Sierra 3500. Recent trend: increasing.
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Repair costs • Negotiation scripts • Mechanic checklist • Buy/skip verdict
Recall History (5 recalls)
SEAT BELTS:CRITICAL FASTENERS
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.
SEAT BELTS:CRITICAL FASTENERS
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.
SERVICE BRAKES, HYDRAULIC:POWER ASSIST:ELECTRIC:CONTROL MODULE
General Motors, LLC (GM) is recalling certain 2021-2022 Chevrolet Silverado 2500, Silverado 3500, GMC Sierra 2500, and Sierra 3500 vehicles with electronic brake control modules (EBCM) replaced during vehicle assembly. The bolts that attach the brake pressure modulator valve (BPMV) assembly may not be properly tightened, which could fail to seal the two sub-assemblies and allow water intrusion.
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.
POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY
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.
Recall severity analysis & seller scripts
The full report rates each recall's severity and gives you scripts for asking the seller about recall completion.
About this data
NHTSA Complaints
Federal database of owner-filed safety complaints. 27 records for this vehicle.
NHTSA Recalls
Manufacturer-issued safety recalls. 5 recalls found for this vehicle.
Repair Cost Data
Real-world repair costs from owner reports and independent databases.
Other Gmc Sierra 3500 Model Years
2021 Gmc Sierra 3500: Frequently Asked Questions
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Does the 2021 Gmc Sierra 3500 have any recalls?
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10 sections of AI analysis based on 27 owner reports. Know before you buy.