2020 Gmc Sierra 1500 prices in Montana
The median asking price for a 2020 Gmc Sierra 1500 in Montana is $34,901 based on 5 active listings.
As of July 25, 2026, the median asking price for a 2020 Gmc Sierra 1500 in Montana is $34,901, based on 5 active dealer listings tracked by VinAssessment.
◷ Updated July 25, 2026 ▤ 5 active dealer listings, refreshed daily Methodology →
Typical: $30,988–$36,748 — the middle half of 5 asking prices
Why the wide range? Price depends mostly on configuration and mileage — see below. This spread covers the middle 96% of asking prices: we exclude the cheapest and priciest 2% (payment-priced ads, typos, salvage) so outliers don't distort it.
What moves the price on a 2020 Gmc Sierra 1500
The $30,988–$36,748 typical range isn't randomness — two factors explain most of it:
Asking prices run about $46,000 at 15K–30K miles and fall to $29,678 over 105K miles — roughly $1,800 for every 10,000 miles.
The Sle typically asks $28,502, while the Denali asks $37,420 — same year, same market.
Find your mileage and trim in the configurator below.
Configure the exact car
Modelled from 48 real asking prices, adjusted for mileage and location. Not a formal appraisal.
2020 Gmc Sierra 1500: a fair price for your mileage
A 2020 Gmc Sierra 1500 sheds roughly $1,800 for every 10,000 miles. Find your mileage below.
Fair price by mileage and trim
| Mileage | All listings | Slt | Denali | At4 | Elevation |
|---|---|---|---|---|---|
| 15K–30K miles | $46,000 | — | $46,000 | — | — |
| 45K–60K miles | $37,064 | — | — | — | $34,495 |
| 60K–75K miles | $39,248 | $36,001 | $41,728 | — | $33,999 |
| 75K–90K miles | $36,145 | $36,557 | $36,325 | $38,045 | — |
| 90K–105K miles | $34,438 | $33,952 | $36,748 | $36,433 | — |
| Over 105K miles | $29,678 | $30,180 | $32,518 | $31,463 | $26,996 |
Medians of live asking prices per band and version; “—” means fewer than 3 matching listings. National data.
Fair price by mileage — all versions combined
| Mileage ⓘ | Based on ⓘ | Fair price ⓘ | Typical range ⓘ |
|---|---|---|---|
| 15K–30K miles | 5 listings | $46,000 | $45K–$48K |
| 45K–60K miles | 6 listings | $37,064 | $35K–$42K |
| 60K–75K miles | 20 listings | $39,248 | $34K–$42K |
| 75K–90K miles | 23 listings | $36,145 | $32K–$38K |
| 90K–105K miles | 23 listings | $34,438 | $33K–$37K |
| Over 105K miles | 57 listings | $29,678 | $27K–$33K |
Same trim and condition assumed — mileage is the biggest lever after configuration. National data; Montana prices track it closely.
2020 Gmc Sierra 1500: price by trim
| Trim | Based on ⓘ | Median price ⓘ | Typical range ⓘ | Where it sits ⓘ |
|---|---|---|---|---|
| Slt | 48 listings | $32,869 | $30K–$36K | |
| Denali | 39 listings | $37,420 | $33K–$40K | |
| At4 | 24 listings | $36,950 | $33K–$40K | |
| Elevation | 15 listings | $30,842 | $28K–$34K | |
| Sle | 6 listings | $28,502 | $26K–$30K |
Based on a small number of listings per trim — medians are indicative, not definitive. National data; Montana prices track it closely.
Price history
Median asking price by month — national · shaded band is the typical range (25th–75th percentile)
The median listing price for a 2020 Gmc Sierra 1500 is $34,198 (July 2026) — down 6.3% from $36,500 in August 2025.
Monthly price table
| Month | Median price | Typical range | Vehicles listed |
|---|---|---|---|
| July 2026 | $34,198 | $30K–$38K | 2,095 |
| June 2026 | $34,053 | $30K–$38K | 2,626 |
| May 2026 | $33,990 | $30K–$38K | 2,556 |
| April 2026 | $33,995 | $30K–$38K | 2,326 |
| March 2026 | $33,995 | $30K–$38K | 2,875 |
| February 2026 | $33,580 | $30K–$37K | 2,875 |
| January 2026 | $33,569 | $30K–$37K | 2,959 |
| December 2025 | $33,995 | $30K–$38K | 2,444 |
| November 2025 | $34,498 | $30K–$39K | 1,578 |
| October 2025 | $35,248 | $31K–$40K | 1,494 |
| September 2025 | $35,995 | $32K–$40K | 1,298 |
| August 2025 | $36,500 | $33K–$41K | 1,355 |
2020 Gmc Sierra 1500 inventory across the U.S.
Keep exploring Sierra 1500 prices
2020 Gmc Sierra 1500 · $33,592 typical · 5 listingsOther Gmc Sierra 1500 years
Live 2020 Gmc Sierra 1500 listings, priced by VIN
Every VIN links to a full market report: decode, active listings and the local price band. Shop 2019–2021 Gmc Sierra 1500 listings on VehiSales →.
More 2020 Gmc prices
Frequently asked questions
Why do 2020 Gmc Sierra 1500 prices range from $27,360 to $38,155 in Montana?
The spread comes down to configuration and mileage: higher-mileage, base-configuration examples sit near the low end, while low-mileage and premium configurations reach the top. Half of all listings fall between $30,988 and $36,748 — see the mileage and trim breakdowns above for where a specific vehicle lands.
How much should mileage change the price of a 2020 Gmc Sierra 1500?
Expect roughly $1,800 less for every 10,000 miles on the odometer. A 60K-mile example should cost about $5,400 less than a 30K-mile one of the same trim — check the fair-price-by-mileage table above for your band.
Do Gmc Sierra 1500 prices in Montana differ from the rest of the country?
Yes. The average in Montana is $33,592, which is $527 below the national average of $34,119. Local supply, demand and transport costs all play a part.
How many 2020 Gmc Sierra 1500 are for sale in Montana right now?
5 in total, nearly all pre-owned. Counts refresh daily from live dealer inventory.
How we calculate these prices
We track 5 active listings for this vehicle across dealer sites nationwide, updated every day. Average and median are computed from real asking prices on live listings. We exclude the top and bottom 2% of prices to remove data errors, salvage titles, and monthly-payment figures posted as if they were sale prices. Prices reflect dealer asking prices — not final sale prices — and exclude taxes, fees, and incentives. Trim and mileage move the price more than any other factor; see the breakdowns above.
Want the original factory equipment and MSRP behind a specific car? Look up the original Monroney sticker for a 2020 Gmc →
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Check individual VINs before you buy — decode the exact trim and mileage, see every active listing, and how each price compares to the local market.