Used 2020 GMC Sierra 1500 prices, November 2026
A used 2020 GMC Sierra 1500 is listed for about $27,909–$35,533 at US dealers (middle 50% of 2,439 listings), with a median of $31,549 at 94,656 miles, as of Nov 7, 2026. That's 1.1% lower than on Oct 25, 2026 ($31,898).
Updated · By CarWhere Research · Source: active US dealer listings (licensed vehicle-data providers) · About this data
Median asking price
$31,549
Average $31,660
Median miles
94,656
Average 96,967
For sale now
2,439
73 certified (3%)
Median days listed
42
How much is a used 2020 GMC Sierra 1500?
A used 2020 GMC Sierra 1500 has a median asking price of $31,549 (average $31,660), with the middle half of listings between $27,909 and $35,533. That's 16% below the median for all used Sierra 1500s ($37,707).
Are used 2020 GMC Sierra 1500 prices going down?
Yes. The median asking price for a used 2020 GMC Sierra 1500 moved from $31,898 on Oct 25, 2026 to $31,549 on Nov 7, 2026 (-1.1%).
Dealer asking price vs. trade-in vs. private sale
The prices on this page are what US dealers are asking for a 2020 GMC Sierra 1500 today, before negotiation, taxes and fees. A dealer's trade-in offer for the same car is usually well below its asking price, because the dealer has to recondition it, carry it and still make a margin. A private sale typically lands between the two. To estimate your own car, try the trade-in calculator or the used car value tool.
Used 2020 GMC Sierra 1500 listings by trim
The SLT is the most common 2020 Sierra 1500 on dealer lots (37.7% of listings). Click a count for those listings.
| Trim | For sale now | Share (%) |
|---|---|---|
| SLT | 920 | 37.7% |
| AT4 | 653 | 26.8% |
| Elevation | 450 | 18.5% |
| SLE | 235 | 9.6% |
| Base | 103 | 4.2% |
| Denali | 78 | 3.2% |
Where are the most used 2020 GMC Sierra 1500s for sale?
Texas has the most (299 listings), followed by Florida, Michigan, California. More local supply means more cars to compare and more room to negotiate.
| State | For sale now | Share of US listings (%) |
|---|---|---|
| Texas | 299 | 12.3% |
| Florida | 121 | 5% |
| Michigan | 106 | 4.3% |
| California | 103 | 4.2% |
| North Carolina | 90 | 3.7% |
| Ohio | 80 | 3.3% |
| Washington | 78 | 3.2% |
| Minnesota | 76 | 3.1% |
| Illinois | 72 | 3% |
| Missouri | 72 | 3% |
Other Sierra 1500 model years
| Model year | Median price (USD) | Median miles | For sale now |
|---|---|---|---|
| 2026 | $55,015 | 9,129 | 3,490 |
| 2025 | $45,447 | 31,688 | 5,178 |
| 2024 | $43,635 | 37,140 | 5,443 |
| 2023 | $41,269 | 50,360 | 4,260 |
| 2021 | $33,064 | 85,583 | 3,598 |
| 2020 | $31,549 | 94,656 | 2,439 |
Frequently asked questions
How much is a 2020 GMC Sierra 1500?
A used 2020 GMC Sierra 1500 has a median asking price of $31,549 (average $31,660), with the middle half of listings between $27,909 and $35,533. That's 16% below the median for all used Sierra 1500s ($37,707). Based on 2,439 listings on Nov 7, 2026.
What is a 2020 GMC Sierra 1500 worth?
At a dealer, most 2020 GMC Sierra 1500s are priced $27,909–$35,533; the median listing has 94,656 miles. Lower miles, a higher trim and certified pre-owned status push a car toward the top of that range. Expect a trade-in offer below the dealer asking range, and a private sale to land in between.
Are used 2020 GMC Sierra 1500 prices going down?
Yes. The median asking price for a used 2020 GMC Sierra 1500 moved from $31,898 on Oct 25, 2026 to $31,549 on Nov 7, 2026 (-1.1%).
How many used 2020 GMC Sierra 1500s are for sale?
2,439 were listed at US dealers on Nov 7, 2026, 73 (3%) certified pre-owned. The most common trim is the SLT (920 listings).
How long does a used 2020 GMC Sierra 1500 take to sell?
Half of the 2020 GMC Sierra 1500s listed today have been on the market 42 days or less.
Where are the most used 2020 GMC Sierra 1500s for sale?
Texas has the most (299 listings), followed by Florida, Michigan, California. More local supply means more cars to compare and more room to negotiate.
About this data
- Period
- Listings active on Nov 7, 2026 (snapshot)
- Filter
- Used and certified 2020 GMC Sierra 1500, all US states
- Counts
- 2,439 listings (73 certified pre-owned)
- Method
- Median, average and 25th–75th percentile asking price, odometer miles and days listed across active used and certified pre-owned 2020 GMC Sierra 1500 listings at US dealers. Change compares today's median with the same model year's median in our Oct 25, 2026 snapshot. Asking prices are what dealers list, not what buyers paid.
- Source
- Active used and certified listings at US dealers from licensed vehicle-data providers. Only aggregates are kept: counts, medians, averages and percentiles.
- Updates
- Refreshed from a new market snapshot on a regular schedule; last updated .
- Data
- Download JSON (the aggregates on this page)