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

VIN1GTU9EET0MZ372639
TrimAT4
Exterior ColorWhite
Drivetrain4WD
Engine3.0L I6
TransmissionAutomatic
Fuel TypeDiesel
Inventory Typeused
Days on Lot38

2021 GMC Sierra 1500

AT4

Fair Price
$43,99042,662 mi

University Park, IL 60484

Is this 2021 GMC Sierra 1500 AT4 a good deal?

OAV verdict: Fair Price

Why: Listed at $43,990, comparable market range $24,900–$45,950, based on 22 comparable listings. Days on lot: 38 days (market average 55 days).

Market price position

24,900
45,950
43,990

$43,990 · within market range

$24,900comparable$45,950
Regional range
$24,900 – $45,950
vs. market
$19,090 above low · $1,960 below high
Comparable vehicles
22
Demand-Verified· Backed by recent sales data

Similar vehicles recently sold in an estimated 1656 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$24,900 – $45,950

Dealer Info

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University Park, IL

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About This 2021 GMC Sierra 1500

Listing updated: May 25, 2026

Listed by an independent dealer in University Park, IL · On lot for 38 days · VIN verifiable at NHTSA

This used 2021 GMC Sierra 1500 AT4 is listed at $43,990 by an independent dealer in University Park, IL 60484. It has 42,662 miles on the odometer. The exterior color is White. It features a 4WD drivetrain with a 3.0L I6 engine and Automatic transmission.

OAV's AI-powered Price-to-Market analysis rates this vehicle as Fair Price — priced at market value. Based on 22 similar vehicles in the University Park market, the estimated market range is $24,900 to $45,950.

This vehicle has been on the lot for 38 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 University Park, IL 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 an independent dealer in University Park, IL, one of 57,000+ U.S. dealerships in OAV's nationwide inventory network.The VIN 1GTU9EET0MZ372639 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 IL

Comparable Vehicles

1,258

Average Price

$39,190

Price Range

$14,850–$61,284

Avg Days on Lot

55

Based on 1,258 comparable 2019-2023 GMC Sierra 1500 listings in IL, the average asking price is $39,190. This listing at $43,990 is $4,800 above average (12% above market). Comparable prices in IL range from $14,850 to $61,284. Similar vehicles spend an average of 55 days on dealer lots in this market.

Similar GMC Sierra 1500 Listings in IL

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