# Used 2020 GMC Sierra 3500HD prices

> The average asking price for a used 2020 GMC Sierra 3500HD is $48,438, with 92,994 miles on average, across 187 cars for sale at U.S. dealers as of Nov 15, 2026.

Data as of Nov 15, 2026 · [ottoquest.com](https://ottoquest.com/models/gmc-sierra-3500hd/2020) · [all GMC Sierra 3500HD model years](https://ottoquest.com/models/gmc-sierra-3500hd.md)

- Average asking price: $48,438 (median $48,489)
- Average miles: 92,994
- For sale now: 187
- Average days listed: 64 (of 175 with a listing date)

## 2020 GMC Sierra 3500HD prices by state

States with 5 or more cars for sale.

| State | Average asking | Average miles | For sale | Days listed |
| --- | ---: | ---: | ---: | ---: |
| Texas | $46,450 | 91,667 | 16 | 58 |
| Washington | $48,395 | 82,422 | 14 | 50 |
| Utah | $48,739 | 92,208 | 13 | 52 |
| Oregon | $52,504 | 76,457 | 10 | 104 |
| Arizona | $55,126 | 81,107 | 9 | 24 |
| Florida | $44,026 | 129,508 | 8 | 69 |
| Montana | $46,318 | 104,643 | 8 | 61 |
| Ohio | $43,428 | 116,506 | 7 | 31 |
| Colorado | $47,828 | 70,341 | 7 | 39 |
| California | $51,226 | 90,630 | 6 | 63 |
| New York | $50,979 | 80,247 | 5 | 90 |
| Virginia | $49,354 | 116,049 | 5 | 36 |
| Minnesota | $48,295 | 93,405 | 5 | 60 |

## Other GMC Sierra 3500HD years

| Year | Average asking | Miles | For sale |
| --- | ---: | ---: | ---: |
| [2026](https://ottoquest.com/models/gmc-sierra-3500hd/2026.md) | $79,597 | 1,348 | 6,986 |
| [2025](https://ottoquest.com/models/gmc-sierra-3500hd/2025.md) | $70,977 | 25,848 | 512 |
| [2024](https://ottoquest.com/models/gmc-sierra-3500hd/2024.md) | $64,627 | 49,376 | 647 |
| [2023](https://ottoquest.com/models/gmc-sierra-3500hd/2023.md) | $55,248 | 63,095 | 225 |
| [2022](https://ottoquest.com/models/gmc-sierra-3500hd/2022.md) | $53,196 | 75,426 | 314 |
| [2021](https://ottoquest.com/models/gmc-sierra-3500hd/2021.md) | $50,651 | 83,191 | 208 |
| **2020** | $48,438 | 92,994 | 187 |
| [2019](https://ottoquest.com/models/gmc-sierra-3500hd/2019.md) | $41,866 | 123,197 | 131 |
| [2018](https://ottoquest.com/models/gmc-sierra-3500hd/2018.md) | $41,090 | 119,511 | 112 |
| [2017](https://ottoquest.com/models/gmc-sierra-3500hd/2017.md) | $38,537 | 127,566 | 56 |
| [2016](https://ottoquest.com/models/gmc-sierra-3500hd/2016.md) | $36,848 | 135,942 | 77 |
| [2015](https://ottoquest.com/models/gmc-sierra-3500hd/2015.md) | $31,843 | 133,590 | 103 |
| [2014](https://ottoquest.com/models/gmc-sierra-3500hd/2014.md) | $28,850 | 122,731 | 23 |
| [2013](https://ottoquest.com/models/gmc-sierra-3500hd/2013.md) | $27,089 | 144,341 | 38 |
| [2012](https://ottoquest.com/models/gmc-sierra-3500hd/2012.md) | $27,739 | 139,540 | 19 |
| [2011](https://ottoquest.com/models/gmc-sierra-3500hd/2011.md) | $23,865 | 139,311 | 20 |
| [2010](https://ottoquest.com/models/gmc-sierra-3500hd/2010.md) | $17,536 | 168,106 | 3 |
| [2009](https://ottoquest.com/models/gmc-sierra-3500hd/2009.md) | $23,029 | 146,216 | 9 |
| [2008](https://ottoquest.com/models/gmc-sierra-3500hd/2008.md) | $22,718 | 152,173 | 11 |
| [2007](https://ottoquest.com/models/gmc-sierra-3500hd/2007.md) | $21,464 | 177,371 | 5 |

## Used 2020 GMC Sierra 3500HD prices: common questions

### What is a fair price for a used 2020 GMC Sierra 3500HD?

Used 2020 GMC Sierra 3500HDs for sale at U.S. dealers ask $48,438 on average (half ask less than $48,489), across 187 cars. The cars for sale have 92,994 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.

### Where is a used 2020 GMC Sierra 3500HD cheapest?

Among states with at least 10 for sale, Texas has the lowest average asking price, $46,450 across 16 cars with 91,667 miles on average, and Oregon the highest, $52,504 across 10 with 76,457 miles on average. Part of a gap between states is mileage and trim, not the state.

### How long are used 2020 GMC Sierra 3500HDs for sale?

The 175 for sale with a listing date have been listed 64 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 2020 GMC Sierra 3500HD compare with the 2019 and 2021?

The 2020 asks $48,438 on average with 92,994 miles; the 2019 asks $41,866 with 123,197 miles, and the 2021 asks $50,651 with 83,191 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-3500hd/2020). 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.