Vehicle Details
2021 GMC Sierra 2500HD
AT4
Pontiac, IL 61764
Is this 2021 GMC Sierra 2500HD AT4 a good deal?
OAV verdict: Overpriced
Why: Listed at $55,962, comparable market range $53,962–$53,962, based on 12 comparable listings. Days on lot: 14 days (market average 74 days).
Market price position
$55,962 · $2,000 above the market benchmark
- Regional range
- $53,962 (12 listings)
- vs. market high
- + $2,000 (4% above)
- Comparable vehicles
- 12
Market Retail Price (MRP™)
$53,962This vehicle $55,962 · $2,000 (4%) above MRP
MRP™ is the midpoint of the comparable market range — the representative price the market is asking for similar vehicles. How MRP works.
True Retail Value (TRV™)
$54,995This vehicle $55,962 · $967 (2%) above TRV
TRV™ is the average paid price for cars like this in the last 60 days (sold data through 2026-07-20) — an estimate, not an appraisal. How TRV works.
Similar vehicles recently sold in an estimated 9–55 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.
Heller Lincoln Of Pontiac
Pontiac, IL
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 Heller Lincoln Of Pontiac for current availability of this 2021 GMC Sierra 2500HD 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 2500HD
Listing updated: Jul 20, 2026Listed by a franchise dealer in Pontiac, IL · On lot for 14 days · VIN verifiable at NHTSA
This used 2021 GMC Sierra 2500HD AT4 is listed at $55,962 by heller lincoln of pontiac in Pontiac, IL 61764. It has 48,959 miles on the odometer. The exterior color is White. It features a 4WD drivetrain with a 6.6L V8 engine and Automatic transmission.
OAV's AI-powered Price-to-Market analysis rates this vehicle as Overpriced — priced above market value. Based on 12 similar vehicles in the Pontiac market, the estimated market range is $53,962 to $53,962.
This vehicle has been on the lot for 14 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 Pontiac, 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 2500HD 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 Pontiac, IL, one of 57,000+ U.S. dealerships in OAV's nationwide inventory network.The VIN 1GT19PEY7MF226251 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 updated daily; Price-to-Market analysis uses comparable vehicles within the same geographic market.
2021 GMC Sierra 2500HD Market in IL
Comparable Vehicles
196
Average Price
$49,761
Price Range
$16,272–$70,412
Avg Days on Lot
74
Based on 196 comparable 2019-2023 GMC Sierra 2500HD listings in IL, the average asking price is $49,761. This listing at $55,962 is $6,201 above average (12% above market). Comparable prices in IL range from $16,272 to $70,412. Similar vehicles spend an average of 74 days on dealer lots in this market.
Similar GMC Sierra 2500HD Listings in IL
8 comparable vehicles within ±2 model years and ±30,000 miles (subject trim: AT4 — compare trims below)
2023 GMC Sierra 2500HD
AT4
East Dubuque, IL
2023 GMC Sierra 2500HD
AT4
East Dubuque, IL
2021 GMC Sierra 2500HD
AT4
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2021 GMC Sierra 2500HD
AT4
El Paso, IL
2020 GMC Sierra 2500HD
Base
Aledo, IL
2023 GMC Sierra 2500HD
Pro
Bourbonnais, IL
2020 GMC Sierra 2500HD
SLE
Crystal Lake, IL
2020 GMC Sierra 2500HD
SLE
McHenry, IL