# Used 2021 GMC Sierra 1500 Double Cab prices

> The average asking price for a used 2021 GMC Sierra 1500 Double Cab is $26,509, with 83,625 miles on average, across 24 cars for sale at U.S. dealers as of Nov 10, 2026.

Data as of Nov 14, 2026 · [ottoquest.com](https://ottoquest.com/models/gmc-sierra-1500-double-cab/2021) · [all GMC Sierra 1500 Double Cab model years](https://ottoquest.com/models/gmc-sierra-1500-double-cab.md)

- Average asking price: $26,509 (median $27,644)
- Average miles: 83,625
- For sale now: 24
- Average days listed: 83 (of 12 with a listing date)

## 2021 GMC Sierra 1500 Double Cab prices by state

Too few cars in any one state yet.

## Other GMC Sierra 1500 Double Cab years

| Year | Average asking | Miles | For sale |
| --- | ---: | ---: | ---: |
| [2025](https://ottoquest.com/models/gmc-sierra-1500-double-cab/2025.md) | $37,610 | 21,766 | 10 |
| [2024](https://ottoquest.com/models/gmc-sierra-1500-double-cab/2024.md) | $34,935 | 34,757 | 11 |
| [2023](https://ottoquest.com/models/gmc-sierra-1500-double-cab/2023.md) | $32,528 | 42,650 | 13 |
| [2022](https://ottoquest.com/models/gmc-sierra-1500-double-cab/2022.md) | $36,190 | 29,108 | 3 |
| **2021** | $26,509 | 83,625 | 24 |
| [2020](https://ottoquest.com/models/gmc-sierra-1500-double-cab/2020.md) | $23,344 | 98,812 | 7 |
| [2019](https://ottoquest.com/models/gmc-sierra-1500-double-cab/2019.md) | $23,482 | 102,815 | 14 |
| [2018](https://ottoquest.com/models/gmc-sierra-1500-double-cab/2018.md) | $27,057 | 56,694 | 3 |
| [2017](https://ottoquest.com/models/gmc-sierra-1500-double-cab/2017.md) | $23,657 | 85,586 | 3 |
| [2015](https://ottoquest.com/models/gmc-sierra-1500-double-cab/2015.md) | $22,090 | 103,069 | 2 |

## Used 2021 GMC Sierra 1500 Double Cab prices: common questions

### What is a fair price for a used 2021 GMC Sierra 1500 Double Cab?

Used 2021 GMC Sierra 1500 Double Cabs for sale at U.S. dealers ask $26,509 on average (half ask less than $27,644), across 24 cars. The cars for sale have 83,625 miles on average: one with fewer miles is worth more, and one with more is worth less. To check one car's price against cars of its trim and mileage, enter its VIN in OttoQuest's free Deal Check.

### How long are used 2021 GMC Sierra 1500 Double Cabs for sale?

The 12 for sale with a listing date have been listed 83 days on average. A car listed much longer than that, or one whose price has already been cut, usually leaves more room to negotiate.

### How does the 2021 GMC Sierra 1500 Double Cab compare with the 2020?

The 2021 asks $26,509 on average with 83,625 miles; the 2020 asks $23,344 with 98,812 miles.

## More

- Check one car's price: https://ottoquest.com/deal-check.md?vin=<VIN>&price=<price>&mileage=<miles> (markdown; the page is https://ottoquest.com/deal-check)
- Value a car by model, trim, year and mileage: https://ottoquest.com/value
- Free alerts for new listings and price drops: https://ottoquest.com/deals

Used and certified cars for sale at U.S. dealers, each car counted once. Days listed are the dealer's own days on market where they publish it. Price moves compare the same cars at both ends of the window.

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OttoQuest · [this page](https://ottoquest.com/models/gmc-sierra-1500-double-cab/2021). Prices are asking prices of cars for sale in the U.S. and recorded sold prices; a guide to the price, not to a car's condition.