VIN 3GTP9EEL3MG120400 · 2021 GMC Sierra 1500
Every dealer listing of this VIN tracked by AutosXchange since 2026-11-05: where it was listed, for how much, and when it left the market. Listed for sale now.
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What this means for you: For sale now at Lion's Auto INC for $37,899, down $1,000 from its first asking price there. Its car page compares that price with similar cars.
2021 GMC Sierra AT4 1500
Factory details for VIN 3GTP9EEL3MG120400 from NHTSA's vehicle database (the manufacturer's own data). The VIN check digit is valid.
| Year | 2021 |
|---|---|
| Make | GMC |
| Model | Sierra |
| Trim | AT4 1500 |
| Body | Pickup |
| Doors | 4 |
| Drive | 4WD/4-Wheel Drive/4x4 |
| Engine | 6.2L 8-cylinder |
| Fuel | Gasoline |
| Built in | Silao, Guanajuato, Mexico |
Recall lookup unavailable right now. Check this VIN at NHTSA →
Decoded data is what the manufacturer reported for this VIN pattern; options and condition of the actual car can differ. Accident and title history are not part of a VIN decode.
Dealer listings of this VIN
| Dealer | Added | Removed | First listed price | Last listed price | Price changes | Outcome |
|---|---|---|---|---|---|---|
| Lion's Auto INCDenver, CO | Nov 5 | Still listed | $38,899 | $37,899current asking | 1 | For saleView listing |
Asking-price changes
| Date | From | To | Change |
|---|---|---|---|
| Nov 6 | $38,899 | $37,899 | −$1,000 |
2021 GMC Sierra 1500: market value
2021 GMC Sierra 1500 AT4 SB: nationwide prices
Nationwide median, last listed and asking prices per day
- Nationwide median $33,925
- Last listed (listings removed) —
- For sale now (asking) $33,900
Nationwide median, last listed and asking prices per day
- Nationwide median $33,925
- Last listed (listings removed) —
- For sale now (asking) $33,900
Nationwide median, last listed and asking prices per day
- Nationwide median $33,925
- Last listed (listings removed) —
- For sale now (asking) $33,900
The market value of this car, at the top, is based on its comparable cars (same 2021 Sierra 1500 AT4 SB · used · nationwide). This chart covers every 2021 GMC Sierra 1500 AT4 SB listed across the U.S., so its figures can differ. Last listed price is the final advertised price of a listing before it was removed from sale, like a stock's last traded price. Nationwide median is the middle price of the last listed prices (listings removed in the window) and the current asking prices together.
This trim for sale now, by area
| Area | Cars | Median asking price | Typical range |
|---|---|---|---|
| Nationwide | 27 | $35,995 | $25,899 – $40,500 |
Market for this car: 2021 GMC Sierra 1500 AT4 SB
Quick numbers for every 2021 GMC Sierra 1500 AT4 SB we track. Pick an area and a period; open the full comparison for more.
Showing Colorado. Tracking began Nov 5, 2026, so 30- and 90-day views cover the days since then.
Colorado, 2026-11-05 to 2026-11-12. Asking prices, not sale prices; a removed listing is often, but not always, a sale.
About this history
Asking prices advertised by dealers, as tracked by AutosXchange; not final sale prices. "Listing removed" means the listing ended and the VIN has not been advertised by any dealer on AutosXchange since; "Moved" means it appeared at another dealer within 45 days. History begins 2026-11-05.
Questions
Where was VIN 3GTP9EEL3MG120400 listed for sale?
Lion's Auto INC in Denver, CO from 2026-11-05 (still listed) at $37,899.
Source: AutosXchange Intel Hub, autos-xchange.com/market, 2026-11-12. AutosXchange Intel Hub · Methodology