Vehicle Details
2021 GMC Sierra 1500
AT4
O'Fallon, MO 63368
Is this 2021 GMC Sierra 1500 AT4 a good deal?
OAV verdict: Fair Price
Why: Listed at $36,790, comparable market range $29,372–$42,592, based on 37 comparable listings. Days on lot: 73 days.
Market price position
$36,790 · within market range
- Regional range
- $29,372 – $42,592
- vs. market
- $7,418 above low · $5,802 below high
- Comparable vehicles
- 37
Similar vehicles recently sold in an estimated 15–54 days.
Market Breakdown
Local = comparable listings in the same metro. Regional = comparable listings across the broader state or multi-state region. Both ranges refresh daily.
Frank Leta Auto Group
O'Fallon, MO
OAV routes your inquiry; pricing, taxes, fees, and availability come from the dealer.
Request availability and out-the-door price
OAV will route your inquiry to Frank Leta Auto Group for current availability of this 2021 GMC Sierra 1500 AT4 and an out-the-door price quote (taxes, fees, addons included).
OAV routes your inquiry; pricing, taxes, fees, and availability come from the dealer.
About This 2021 GMC Sierra 1500
Listing updated: Jul 12, 2026Listed by a franchise dealer in O'Fallon, MO · On lot for 73 days · VIN verifiable at NHTSA
This used 2021 GMC Sierra 1500 AT4 is listed at $36,790 by frank leta auto group in O'Fallon, MO 63368. It has 84,643 miles on the odometer. The exterior color is Blue. It features a 4WD drivetrain with a 5.3L V8 engine and Automatic transmission.
OAV's AI-powered Price-to-Market analysis rates this vehicle as Fair Price — priced at market value. Based on 37 similar vehicles in the O'Fallon market, the estimated market range is $29,372 to $42,592. The local market range in MO is $35,594 to $35,594.
This vehicle has been on the lot for 73 days.
Analysis powered by OAV's patented inventory standardization technology (U.S. Patent No. 12,236,477).
Market context
This listing is part of OAV's broader O'Fallon, MO trucks market analysis. OAV compares vehicles using local and regional price-to-market ranges, days-on-lot, comparable count, and demand signals where available.
How this deal is rated
OAV compares this 2021 GMC Sierra 1500 against similar vehicles currently available in the local and regional market — same make, model, and year range, filtered for comparable mileage. Based on where this listing falls in that comparable set, it is rated:
- Great Deal — priced below the typical range for comparable vehicles.
- Fair Price — priced within the expected range for comparable vehicles.
- Overpriced — priced above the typical range for comparable vehicles.
Listings show OAV's PTM-derived deal quality and live market context. OAV-claimed dealers manage their listing profile and route buyer inquiries directly. Paid OAV partners surface additional verification signals.
How this listing is verified
This vehicle listing was aggregated from a franchise dealer in O'Fallon, MO, one of 57,000+ U.S. dealerships in OAV's nationwide inventory network.The VIN 1GTP9EED5MZ348696 can be independently verified via the U.S. Department of Transportation's NHTSA VIN decoder, and safety recalls at NHTSA's recall database.
Vehicle attributes (year, make, model, trim, mileage, location) are standardized using OAV's patented methodology (U.S. Patent No. 12,236,477), which normalizes naming conventions and deduplicates cross-listed inventory across the dealership network. Listing data is refreshed daily; Price-to-Market analysis uses comparable vehicles within the same geographic market.