2020 GMC Sierra SLE
1GTR9BED3LZ305139
GOOD DEAL
· $1,132 below typical price
Plattsburgh, NY
This 2020 GMC Sierra SLE is listed at $28,313 with 85,055 miles in Plattsburgh, NY.
Sold by Brennan Buick GMC
Contact details come from the dealer's listing and public business records. VinAssessment is not the seller and takes no fee — you deal with the dealer directly.
2020 GMC Sierra SLE
VIN 1GTR9BED3LZ305139
Market price range
Based on 18 comparable same-build listings · Market data as of September 11, 2026This vehicle: $28,313 — $1,132 below the typical market price ($29,445)
Asking $28,313 · typical market price $29,445 · based on 18 comparable same-build listings.
Love this car? See what else is out there.
2020 GMC Sierra SLE for sale near PlattsburghNY
9 cheaper within 50 miles · best $1,415 less
Compare on VehiSales ↗ · No dealer spam.
We don't sell cars and never share your details with dealers.
50 miles around Plattsburgh
Lower price Other cars Search center
Dots show approximate vehicle locations.
Vehicle locations appear when available.
Price history for this VIN
Price increased $175 (+0.6%) over 3 days.
Asking prices recorded across 3 listing dates for VIN 1GTR9BED3LZ305139, spanning 3 days.
Active listing
Full listing history on VehiSales →| Dealer | Location | Price | Mileage | Listed | Seen |
|---|---|---|---|---|---|
| Brennan Buick GMC | Plattsburgh, NY 12901 | $28,313 | 85,055 mi | 2026-09-04 | 3 h ago |
Former listings
| Dealer | Location | Price | Mileage | Listed | Seen |
|---|---|---|---|---|---|
| — | $35,900 | 42 mi | 2024-07-02 | 727 d ago |
Decoded from the VIN
NHTSA build data for 1GTR9BED3LZ305139Full 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 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 August 27, 2026.
Where the price is heading
Typical asking price for a 2020 GMC Sierra over the last 6 months — the market firmed $119 in that span.
Monthly price table
| Month | Typical price |
|---|---|
| April 2026 | $34,990 |
| May 2026 | $36,244 |
| June 2026 | $36,234 |
| July 2026 | $35,989 |
| August 2026 | $35,461 |
| September 2026 | $35,109 |
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) | $28,313 | 18 | — |
| 2021 Chevrolet Silverado | $27,170 | 13 | −$1,143 |
| 2021 Ram 1500 | $28,422 | 6 | +$109 |
| 2022 Chevrolet Silverado LTD | $33,075 | 5 | +$4,762 |
| 2022 Chevrolet Silverado HD | $51,125 | 3 | +$22,812 |
| 2021 Ram 2500 | $33,398 | 2 | +$5,085 |
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 | 4,013 | $36,595 | 100% | 84,184 mi |
| 2020 | 2,979 | $35,968 | 98% | 93,461 mi |
| 2019 | 1,873 | $31,792 | 87% | 97,964 mi |
Units for sale — listings of each model year in the latest nightly market snapshot.
