2021 GMC Sierra SLE
3GTP8BED6MG101057
This vehicle is no longer listed. The figures below describe the market for this build.
Market price range
Based on 4 comparable same-build listings · Market data as of September 2, 2026Listings
Full listing history on VehiSales →No active listings of this exact VIN right now.
Estimate the monthly payment at the typical market price ($28,406)
This vehicle is no longer listed, so the estimate starts from $28,406 — the typical market price for this build. Move the numbers to match your own loan.
Estimate only. Excludes tax, title, registration and dealer fees, and assumes a fixed-rate loan with equal monthly payments. Your actual rate depends on your credit and lender.
Decoded from the VIN
NHTSA build data for 3GTP8BED6MG101057Full factory specs for this build →
- ✗ Backup camera
- ✗ Blind-spot monitor
- ✗ Lane departure
- ✗ ABS
- ✗ Electronic stability
GMC
Window sticker on file for this VIN
The original window sticker for this Sierra
Factory equipment, the options actually installed and the price this car left the line with — the same document that hung on the glass in the showroom.
Open the sticker — $4
3 for $9
Opens on VehiLeaks · PDF right after checkout
Fuel economy (EPA)
Assumes 15,000 miles a year at $3.10/gallon and 26 MPG combined.
5-year cost to own
Beyond the sticker: what this 2021 GMC Sierra likely costs over five years at 15,000 mi/yr.
Estimate — insurance and taxes vary by driver and state.
Model-level data for the 2021 GMC Sierra from EPA fueleconomy.gov, refreshed August 27, 2026.
Where the price is heading
Typical asking price for a 2021 GMC Sierra over the last 6 months — the market firmed $857 in that span.
Monthly price table
| Month | Typical price |
|---|---|
| April 2026 | $34,940 |
| May 2026 | $36,867 |
| June 2026 | $36,500 |
| July 2026 | $36,991 |
| August 2026 | $36,089 |
| September 2026 | $35,797 |
Market by model year
Gen 4 · 2019–2021What each model year costs right now — live supply, median asking price and how much value each year keeps versus the newest one.
| Year | Units for sale | Median price | vs newest | Avg mileage |
|---|---|---|---|---|
| 2021 | 4,454 | $36,686 | 100% | 84,208 mi |
| 2020 | 3,096 | $35,738 | 97% | 94,011 mi |
| 2019 | 1,823 | $31,826 | 87% | 97,985 mi |
Units for sale — listings of each model year in the latest nightly market snapshot.
