U.S. Patent No. 12,236,477 — Patented Automotive Data Standardization Technology
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Vehicle Details

VIN1GTP9EEL6MZ452329
TrimAT4
Exterior ColorRed
Drivetrain4WD
Engine6.2L V8
TransmissionAutomatic
Fuel TypeUnleaded
Inventory Typeused
Days on Lot29

2021 GMC Sierra 1500

AT4

Overpriced
$44,38232,883 mi

Irwin, PA 15642

Is this 2021 GMC Sierra 1500 AT4 a good deal?

OAV verdict: Overpriced

Why: Listed at $44,382, comparable market range $29,121–$41,489, based on 14 comparable listings. Days on lot: 29 days (market average 51 days).

Market price position

29,121
41,489
44,382

$44,382 · $2,893 above market high

$29,121comparable$41,489
Regional range
$29,121 – $41,489
vs. market high
+ $2,893 (7% above)
Comparable vehicles
14
Demand-Verified· Backed by recent sales data

Similar vehicles recently sold in an estimated 1554 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.

Regional Range$29,121 – $41,489

Jim Shorkey Auto Group

Irwin, PA

OAV routes your inquiry; pricing, taxes, fees, and availability come from the dealer.

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Request availability and out-the-door price

OAV will route your inquiry to Jim Shorkey 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: Jun 25, 2026

Listed by a franchise dealer in Irwin, PA · On lot for 29 days · VIN verifiable at NHTSA

This used 2021 GMC Sierra 1500 AT4 is listed at $44,382 by jim shorkey auto group in Irwin, PA 15642. It has 32,883 miles on the odometer. The exterior color is Red. It features a 4WD drivetrain with a 6.2L V8 engine and Automatic transmission.

OAV's AI-powered Price-to-Market analysis rates this vehicle as Overpriced — priced above market value. Based on 14 similar vehicles in the Irwin market, the estimated market range is $29,121 to $41,489.

This vehicle has been on the lot for 29 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 Irwin, PA 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:

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 Irwin, PA, one of 57,000+ U.S. dealerships in OAV's nationwide inventory network.The VIN 1GTP9EEL6MZ452329 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.

2021 GMC Sierra 1500 Market in PA

Comparable Vehicles

1,747

Average Price

$40,178

Price Range

$17,580–$65,485

Avg Days on Lot

51

Based on 1,747 comparable 2019-2023 GMC Sierra 1500 listings in PA, the average asking price is $40,178. This listing at $44,382 is $4,204 above average (10% above market). Comparable prices in PA range from $17,580 to $65,485. Similar vehicles spend an average of 51 days on dealer lots in this market.

Similar GMC Sierra 1500 Listings in PA

8 comparable vehicles within ±2 model years and ±30,000 miles (subject trim: AT4 — compare trims below)