Vehicle Details
2021 GMC Sierra 1500
AT4
Naples, FL 34104
Is this 2021 GMC Sierra 1500 AT4 a good deal?
OAV verdict: Fair Price
Why: Listed at $41,123, comparable market range $29,187–$54,129, based on 20 comparable listings. Days on lot: 255 days (market average 42 days).
Market price position
$41,123 · within market range
- Regional range
- $29,187 – $54,129
- vs. market
- $11,936 above low · $13,006 below high
- Comparable vehicles
- 20
Similar vehicles recently sold in an estimated 16–60 days.
- This listing has been on market about 4.3x longer than typical for similar vehicles (cohort sells in 16–60 days; this one is at 255). Long days-on-lot on a fast-turn cohort can signal title concerns, mechanical issues, or pricing the dealer won't actually honor. Recommend a vehicle history report before spending more time.
Market Breakdown
Local = comparable listings in the same metro. Regional = comparable listings across the broader state or multi-state region. Both ranges refresh daily.
Dealer Info
Naples, FL
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About This 2021 GMC Sierra 1500
Listing updated: May 18, 2026Listed by a franchise dealer in Naples, FL · On lot for 255 days · VIN verifiable at NHTSA
This used 2021 GMC Sierra 1500 AT4 is listed at $41,123 by a franchise dealer in Naples, FL 34104. It has 98,685 miles on the odometer. The exterior color is Blue. 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 20 similar vehicles in the Naples market, the estimated market range is $29,187 to $54,129. The local market range in FL is $40,000 to $40,000.
This vehicle has been on the lot for 255 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 Naples, FL 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.
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 Naples, FL, one of 57,000+ U.S. dealerships in OAV's nationwide inventory network.The VIN 1GTP9EEDXMZ317878 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 FL
Comparable Vehicles
2,376
Average Price
$39,749
Price Range
$11,999–$74,995
Avg Days on Lot
42
Based on 2,376 comparable 2019-2023 GMC Sierra 1500 listings in FL, the average asking price is $39,749. This listing at $41,123 is $1,374 above average (3% above market). Comparable prices in FL range from $11,999 to $74,995. Similar vehicles spend an average of 42 days on dealer lots in this market.
Similar GMC Sierra 1500 Listings in FL
8 comparable vehicles within ±2 model years and ±30,000 miles (subject trim: AT4 — compare trims below)

2020 GMC Sierra 1500
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2021 GMC Sierra 1500
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2021 GMC Sierra 1500
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2019 GMC Sierra 1500
AT4
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2019 GMC Sierra 1500
AT4
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2019 GMC Sierra 1500
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Fruitland Park, FL

2019 GMC Sierra 1500
AT4
Tampa, FL

2021 GMC Sierra 1500
AT4
Naples, FL