400KMile ratingNo known defect pattern for this model year
The 2021 GMC Sierra 3500HD is not on our list of model years with a widely reported mechanical or electrical problem. That is a point in its favour, not a clean bill of health — this car's own history still matters, so check the VIN report and get it inspected.
What owners of the 2021 Sierra 3500HD say
Owner reviews for this exact model year are the fastest way to find out what breaks, what it costs to fix and whether the car lives up to the spec sheet.
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About this car
The GMC Sierra 3500HD is No. 7 on the Caboose longevity table: 26.2% of them reach 250,000 miles, against 5.4% of all vehicles. This 2021 GMC Sierra 3500HD SLE Crew Cab 4WD is listed at $30,392, about $2,697 below the CarGurus expected market price of $33,089. It has 128,369 miles and comes in White. Power comes from a 401 hp 6.6L V8 with four-wheel drive. It is offered by Emerald Motors in Blaine, WA.
Why it's a good buy
- 26.2% of GMC Sierra 3500HDs reach 250,000 miles — No. 7 of 52 on the Caboose table
- 71,631 miles of runway before 200,000
- 8% below market price ($2,697 savings)
- No widely reported defect pattern for this model year
- Navigation System
- Suspension Package
Features
Get it road-ready
The usual first-week purchases for a 2021 GMC Sierra 3500HD, from partners we trust.
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