Used value estimate
2021 GMC Sierra 1500 value
By Hari Vinayak · Updated 2026-06-12
Quick answer
A 2021 GMC Sierra 1500 in good condition with average mileage (about 62,500 miles) is worth roughly $27,400 in a private-party sale — a fair range of $25,200 to $29,600, or about $31,500 at a dealer. 2021 is not on our years-to-avoid list, so condition, history, and maintenance matter more than the model year here.
Estimated value by mileage
Good condition, clean title. Mileage is the biggest single factor at this age.
| Mileage | Miles | Fair value | Private party |
|---|---|---|---|
| Lower mileage | 42,500 | $30,050 | $27,650–$32,450 |
| Average mileage | 62,500 | $27,400 | $25,200–$29,600 |
| Higher mileage | 85,000 | $24,450 | $22,500–$26,400 |
Is 2021 a good year to buy?
2021 is not on our years-to-avoid list for this model, so judge the individual car on history and maintenance.
Compare the best and worst Sierra 1500 yearsWhat to check before you pay
- AFM/DFM lifter collapse (5.3/6.2) — cold ticking, misfires, check-engine history
- 2014–2019 8-speed: torque converter shudder ('Chevy shake') — GM's fluid change helps; ask if it was done
- AC condenser failures, especially 2014–2018 — confirm cold AC
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