2021 GMC Sierra
3GTN8AEH9MG389449
This vehicle is no longer listed. The figures below describe the market for this build.
Market price range
Based on 5 comparable same-build listings · Market data as of August 31, 2026Price history for this VIN
Price increased $495 (+2.2%) over 72 days.
Asking prices recorded across 4 listing dates for VIN 3GTN8AEH9MG389449, spanning 72 days.
Listings
Full listing history on VehiSales →No active listings of this exact VIN right now.
Former listings
| Dealer | Location | Price | Mileage | Listed |
|---|---|---|---|---|
| Koons of Tysons Chevrolet GMC | Vienna, VA 22182 | $23,495 | 61,075 mi | 2026-05-29 |
| Koons Tysons Toyota | Vienna, VA 22182 | $19,750 | 60,962 mi | 2026-03-20 |
| Koons Toyota Tysons | Vienna, VA 22182 | $23,000 | 60,962 mi | 2026-03-18 |
Estimate the monthly payment at the typical market price ($17,888)
This vehicle is no longer listed, so the estimate starts from $17,888 — 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 3GTN8AEH9MG389449Full factory specs for this build →
- ✗ Backup camera
- ✗ Blind-spot monitor
- ✗ Lane departure
- ✗ ABS
- ✗ Electronic stability
Rebuild the original window sticker for this VIN — packages, standard equipment and the sticker price the seller left out of the ad.
Look up the factory Monroney sticker by VIN →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 held steady .
Monthly price table
| Month | Typical price |
|---|---|
| March 2026 | $35,999 |
| April 2026 | $34,940 |
| May 2026 | $36,867 |
| June 2026 | $36,500 |
| July 2026 | $36,991 |
| August 2026 | $35,999 |
How it compares to rivals
Median asking price for comparable body styles listed near this car| Model | Median price | For sale nearby | vs this car |
|---|---|---|---|
| 2021 GMC Sierra (this car) | $17,888 | 5 | — |
| 2022 Ram 1500 | $34,690 | 19 | +$16,802 |
| 2022 Ford F-150 | $41,121 | 12 | +$23,233 |
| 2019 Chevrolet Silverado | $32,736 | 10 | +$14,848 |
| 2020 Toyota Tacoma | $33,844 | 9 | +$15,956 |
| 2023 Toyota Tundra | $43,638 | 4 | +$25,750 |
Cheapest active listings of each comparable body style in this region — median of what those models actually ask.
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 | 4,015 | $36,804 | 100% | 84,186 mi |
| 2020 | 2,973 | $35,760 | 97% | 93,794 mi |
| 2019 | 1,624 | $31,778 | 86% | 98,353 mi |
Units for sale — listings of each model year in the latest nightly market snapshot.
