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2021 GMC Sierra 1500

Vehicle Details

VIN1GTP9EEL8MZ441350
TrimAT4
Exterior ColorBlack
Drivetrain4WD
Engine5.3L V8
TransmissionAutomatic
Fuel TypeUnleaded
Inventory Typeused
Days on Lot17
Days on Market44

2021 GMC Sierra 1500

AT4

Fair Price
$41,16443,421 miles

Sycamore, IL 60178

Market price position

30,787
44,995
41,164

$41,164 · within market range

$30,787comparable$44,995
Regional range
$30,787 – $44,995
vs. market
$10,377 above low · $3,831 below high
Comparable vehicles
34
Demand-Verified· Backed by recent sales data

Similar vehicles recently sold in an estimated 1660 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$30,787 – $44,995

Dealer Info

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Sycamore, IL

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About This 2021 GMC Sierra 1500

Listing updated: Apr 27, 2026

Listed by a franchise dealer in Sycamore, IL · On lot for 17 days · VIN verifiable at NHTSA

This used 2021 GMC Sierra 1500 AT4 is listed at $41,164 by a franchise dealer in Sycamore, IL 60178. It has 43,421 miles on the odometer. The exterior color is Black. 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 34 similar vehicles in the Sycamore market, the estimated market range is $30,787 to $44,995.

This vehicle has been on the lot for 17 days.

Analysis powered by OAV's patented inventory standardization technology (U.S. Patent No. 12,236,477).

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:

This rating refreshes daily as inventory enters and leaves the market. The dealer on this listing has not yet activated on OAV, so the business name and contact details are anonymized here. Activated (paying) dealers appear with their verified business name and a Verified badge.

How this listing is verified

This vehicle listing was aggregated from a franchise dealer in Sycamore, IL, one of 57,000+ U.S. dealerships in OAV's nationwide inventory network.The VIN 1GTP9EEL8MZ441350 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

1,104

Average Price

$39,372

Price Range

$16,495–$62,995

Avg Days on Lot

60

Based on 1,104 comparable 2019-2023 GMC Sierra 1500 listings in IL, the average asking price is $39,372. This listing at $41,164 is $1,792 above average (5% above market). Comparable prices in IL range from $16,495 to $62,995. Similar vehicles spend an average of 60 days on dealer lots in this market.

Similar GMC Sierra 1500 Listings in IL

8 comparable vehicles with similar year and mileage