Free Preview
#BS-2020-GMCSIE-55F32020 Gmc Sierra 3500
Based on reports from 71 owners and 8 recalls for this exact model.
Preliminary Verdict
Think Twice
Based on 71 complaints, 6 crashes, 4 fires, and 8 recalls.
Top reported problems
engine light on
2 complaints • Severity 6/10
shaking in the steering
1 complaints • Severity 8/10
knocking sound from left front corner
1 complaints • Severity 8/10
Preview: What's in your full report
Each card shows a real sample from your report — unlock all 10 sections from $1.20
Mechanic Inspection Checklist
18 owners reported drivetrain issues — failures commonly reported around 29K miles.
Failure Timeline by Mileage
Peak failure range: 0–30K miles (7 reports) • Median: 29K miles
30,000-Mile Cost Projection
Best Case
Most Likely
Worst Case
Top cost driver: Drivetrain (18 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
2020 Gmc Sierra 3500: Known Issues & Problem Areas
Drivetrain Issues
Drivetrain complaints account for 25% of all reports filed for the 2020 Gmc Sierra 3500, with 18 owners filing complaints with NHTSA. The median mileage at time of complaint is 29,400 miles, suggesting issues tend to surface around the 29K-mile mark.
Electrical Issues
Electrical complaints account for 11% of all reports filed for the 2020 Gmc Sierra 3500, with 8 owners filing complaints with NHTSA. Owners should pay attention to electrical-related symptoms during test drives and pre-purchase inspections.
Brakes Issues
Brakes complaints account for 10% of all reports filed for the 2020 Gmc Sierra 3500, with 7 owners filing complaints with NHTSA. Owners should pay attention to brakes-related symptoms during test drives and pre-purchase inspections.
Engine Issues
Engine complaints account for 8% of all reports filed for the 2020 Gmc Sierra 3500, with 6 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 2020 Gmc Sierra 3500. Recent trend: decreasing.
Don't negotiate blind — know what this car costs to own
Repair costs • Negotiation scripts • Mechanic checklist • Buy/skip verdict
Recall History (8 recalls)
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.
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.
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 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.
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.
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.
+ 3 more recalls in the full report
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. 71 records for this vehicle.
NHTSA Recalls
Manufacturer-issued safety recalls. 8 recalls found for this vehicle.
Repair Cost Data
Real-world repair costs from owner reports and independent databases.
Other Gmc Sierra 3500 Model Years
2020 Gmc Sierra 3500: Frequently Asked Questions
What is the most common problem with the 2020 Gmc Sierra 3500?
Is the 2020 Gmc Sierra 3500 reliable?
How much does it cost to fix 2020 Gmc Sierra 3500 problems?
Does the 2020 Gmc Sierra 3500 have any recalls?
What mileage do Gmc Sierra 3500 problems start?
What’s in the full report?
How is this different from free NHTSA data?
How is this different from Carfax?
What if the report isn’t useful?
Get the Full 2020 Gmc Sierra 3500 Report
10 sections of AI analysis based on 71 owner reports. Know before you buy.