2020 GMC Sierra SLE
3GTU9BED6LG117581
GOOD DEAL
· $5,554 below typical price
Somerset, PA
This 2020 GMC Sierra SLE is listed at $21,345 with 135,903 miles in Somerset, PA.
Market price range
Based on 27 comparable same-build listings · Market data as of August 26, 2026This vehicle: $21,345 — $5,554 below the typical market price ($26,899)
Asking $21,345 · typical market price $26,899 · based on 27 comparable same-build listings.
Price history for this VIN
Price increased $350 (+1.7%) over 7 days.
Asking prices recorded across 2 listing dates for VIN 3GTU9BED6LG117581, spanning 7 days.
Active listing
Full listing history on VehiSales →| Dealer | Location | Price | Mileage | Listed |
|---|---|---|---|---|
| Woy Brothers GMC | Somerset, PA 15501 | $21,345 | 135,903 mi | 2026-08-22 |
What would this 2020 GMC Sierra SLE cost per month?
Estimate the monthly payment on a $21,345 vehicle. 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 3GTU9BED6LG117581- ✓ 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.
Pull the original window sticker →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 2020 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 2020 GMC Sierra from EPA fueleconomy.gov, refreshed July 28, 2026.
Where the price is heading
Typical asking price for a 2020 GMC Sierra over the last 6 months — the market softened $995 in that span.
Monthly price table
| Month | Typical price |
|---|---|
| March 2026 | $35,995 |
| April 2026 | $34,990 |
| May 2026 | $36,244 |
| June 2026 | $36,234 |
| July 2026 | $35,989 |
| August 2026 | $35,000 |
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 |
|---|---|---|---|
| 2020 GMC Sierra SLE (this car) | $21,345 | 27 | — |
| 2021 Chevrolet Silverado | $35,991 | 3 | +$14,646 |
| 2022 Chevrolet Colorado | $25,720 | 2 | +$4,375 |
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 | 3,251 | $36,795 | 100% | 83,986 mi |
| 2020 | 2,350 | $35,354 | 96% | 94,289 mi |
| 2019 | 1,669 | $31,950 | 87% | 97,870 mi |
Units for sale — listings of each model year in the latest nightly market snapshot.
Watch the price on this model
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