Vehicle Details
2021 GMC Sierra 1500
AT4
Mount Pleasant, WI 53406
Is this 2021 GMC Sierra 1500 AT4 a good deal?
OAV verdict: Unscored
Why: Listed at $40,492, comparable market range $34,999–$38,647, based on 4 comparable listings. Days on lot: 127 days (market average 56 days).
Market price position
$40,492 · $1,845 above market high
- Regional range
- $34,999 – $38,647
- vs. market high
- + $1,845 (5% above)
- Comparable vehicles
- 4
Market Retail Price (MRP™)
$36,823This vehicle $40,492 · $3,669 (10%) 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™)
$40,013This vehicle $40,492 · $479 (1%) above TRV
TRV™ is the average paid price for cars like this in the last 60 days (sold data through 2026-07-19) — an estimate, not an appraisal. How TRV works.
Similar vehicles recently sold in an estimated 15–53 days.
Market Breakdown
Local = comparable listings in the same metro. Regional = comparable listings across the broader state or multi-state region. Both ranges update continuously.
Frank Boucher Chevrolet
Mount Pleasant, WI
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 Boucher Chevrolet 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 18, 2026Listed by a franchise dealer in Mount Pleasant, WI · On lot for 127 days · VIN verifiable at NHTSA
This used 2021 GMC Sierra 1500 AT4 is listed at $40,492 by frank boucher chevrolet in Mount Pleasant, WI 53406. It has 63,874 miles on the odometer. The exterior color is White. 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 Unscored due to insufficient comparable data. Based on 4 similar vehicles in the Mount Pleasant market, the estimated market range is $34,999 to $38,647. The local market range in WI is $34,999 to $38,647.
This vehicle has been on the lot for 127 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 Mount Pleasant, WI 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 Mount Pleasant, WI, one of 57,000+ U.S. dealerships in OAV's nationwide inventory network.The VIN 1GTP9EED3MZ444486 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 continuously; Price-to-Market analysis uses comparable vehicles within the same geographic market.
2021 GMC Sierra 1500 Market in WI
Comparable Vehicles
1,455
Average Price
$39,276
Price Range
$17,995–$60,479
Avg Days on Lot
56
Based on 1,455 comparable 2019-2023 GMC Sierra 1500 listings in WI, the average asking price is $39,276. This listing at $40,492 is $1,216 above average (3% above market). Comparable prices in WI range from $17,995 to $60,479. Similar vehicles spend an average of 56 days on dealer lots in this market.
Similar GMC Sierra 1500 Listings in WI
8 comparable vehicles within ±2 model years and ±30,000 miles (subject trim: AT4 — compare trims below)
2019 GMC Sierra 1500
AT4
Plymouth, WI
2019 GMC Sierra 1500
AT4
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2020 GMC Sierra 1500
AT4
Burlington, WI
2020 GMC Sierra 1500
AT4
Kenosha, WI
2020 GMC Sierra 1500
AT4
Mukwonago, WI
2020 GMC Sierra 1500
AT4
West Bend, WI
2021 GMC Sierra 1500
AT4
Beloit, WI
2021 GMC Sierra 1500
AT4
Delavan, WI