2021 GMC Sierra 3500HD

Listed by an independent dealer in San Marcos, TX · On lot for 341 days · VIN verifiable at NHTSA

This used 2021 GMC Sierra 3500HD SLT is listed at $35,995 by an independent dealer in San Marcos, TX 78666. It has 155,244 miles on the odometer. The exterior color is Silver. 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 Unscored due to insufficient comparable data. Based on available similar vehicles in the San Marcos market, the estimated market range is $35,995 to $35,995.

This vehicle has been on the lot for 341 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 San Marcos, TX trucks market analysis. OAV compares vehicles using local and regional price-to-market ranges, days-on-lot, comparable count, and demand signals where available.

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How this deal is rated

OAV compares this 2021 GMC Sierra 3500HD 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 an independent dealer in San Marcos, TX, one of 57,000+ U.S. dealerships in OAV's nationwide inventory network.The VIN 1GT49UE74MF293862 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 3500HD Market in TX

Based on 83 comparable 2019-2023 GMC Sierra 3500HD listings in TX, the average asking price is $47,585. This listing at $35,995 is $11,590 below average (24% below market). Comparable prices in TX range from $23,990 to $89,990. Similar vehicles spend an average of 68 days on dealer lots in this market.

Similar GMC Sierra 3500HD Listings in TX

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