2021 GMC Sierra SLT
VIN
3GTU9DET1MG126211
This 2021 GMC Sierra SLT is listed at $42,220 with 85,781 miles in Harlingen, TX.
Market Price Range
Below market
$29,399
Typical price
$34,823
Above market
$39,727
Based on
99
comparable same-build listings.
above market price ($39727)
Market data as of July 26, 2026
Vehicle Decode
- Body
- Pickup
- Engine
- 3.0L · V6 · Diesel
- Drive
- 4WD/4-Wheel Drive/4x4
- Doors
- 4
- Made by
- GENERAL MOTORS LLC
Safety
- ✗ Backup camera
- ✗ Blind-spot monitor
- ✗ Lane departure
- ✗ ABS
- ✗ Electronic stability
Active listings
Full listing history on VehiSales →| Dealer | Location | Price | Mileage | Listed |
|---|---|---|---|---|
| Gillman Chevrolet Harlingen | Harlingen, TX 78552 | $42,220 | 85,781 mi | 2026-07-25 |
| Gillman Chevrolet of Harlingen | Harlingen, TX 78552 | $42,237 | 85,781 mi | 2026-07-21 |
| Gillman Chevrolet of Harlingen | Harlingen, TX 78552 | $41,995 | 85,781 mi | 2026-07-21 |
Former listings
| Dealer | Location | Price | Mileage | Listed |
|---|---|---|---|---|
| Gillman Chevrolet of Harlingen | Harlingen, TX 78552 | — | 85,781 mi | 2026-07-21 |
| Gillman Chevrolet of Harlingen | Harlingen, TX 78552 | — | 85,781 mi | 2026-07-21 |
| Gillman Chevrolet GMC | San Benito, TX 78586 | $44,179 | 70,313 mi | 2024-06-25 |
