What is a GMC Sierra worth?
A 2021 GMC Sierra in good condition with average distance is worth about $31,150 on trade-in — but should fetch $34,350–$38,350 when dealers and private buyers bid against each other. That gap is roughly $5,200.
GMC Sierra value by year
Good condition, at the distance typical for each model year (about 18,000 km a year, the Canadian average).
| Year | Distance | Trade-in | At auction | Private sale |
|---|---|---|---|---|
| 2025 | 18,000 km | $42,550 | $46,900 – $52,350 | $56,750 |
| 2024 | 36,000 km | $39,350 | $43,400 – $48,450 | $52,500 |
| 2023 | 54,000 km | $36,400 | $40,150 – $44,800 | $48,550 |
| 2022 | 72,000 km | $33,700 | $37,150 – $41,450 | $44,900 |
| 2021 | 90,000 km | $31,150 | $34,350 – $38,350 | $41,550 |
| 2020 | 108,000 km | $28,800 | $31,750 – $35,450 | $38,400 |
| 2019 | 126,000 km | $26,650 | $29,400 – $32,800 | $35,550 |
| 2018 | 144,000 km | $24,650 | $27,200 – $30,350 | $32,850 |
| 2017 | 162,000 km | $22,800 | $25,150 – $28,050 | $30,400 |
| 2016 | 180,000 km | $21,100 | $23,250 – $25,950 | $28,150 |
How distance changes it
A 2021 GMC Sierra in good condition, at different odometer readings.
| Distance | Trade-in | At auction |
|---|---|---|
| 40,000 km | $34,950 | $38,550 – $43,050 |
| 80,000 km | $31,900 | $35,200 – $39,300 |
| 120,000 km | $28,850 | $31,850 – $35,550 |
| 160,000 km | $25,800 | $28,450 – $31,800 |
| 200,000 km | $22,750 | $25,100 – $28,050 |
How condition changes it
| Condition | At auction |
|---|---|
| Excellent — no needs | $37,100 – $41,400 |
| Good — normal wear | $34,350 – $38,350 |
| Fair — cosmetic or minor mechanical | $30,200 – $33,750 |
| Needs work | $24,050 – $26,850 |
Condition is the single biggest lever you control. A detail, a fresh set of tires and a tidy service file routinely move a car up a grade.
Where these numbers come from
Our Smart Estimate starts from the GMC Sierra's delivered price when new, then applies a depreciation curve, your distance measured against the Canadian average, condition, body-style demand, how well GMC holds value relative to the segment, and the season you're selling in.
Nothing is hidden: run your own car and the tool shows every factor and what it added or subtracted. It's an estimate, not an appraisal — service history, accident record and tires all move the real number.
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