2021 GMC Sierra 2500HD AT4

Listed by an independent dealer in Marietta, GA · On lot for 13 days · VIN verifiable at NHTSA

This used 2021 GMC Sierra 2500HD AT4 is listed at $54,800 by legacy motorcars in Marietta, GA 30062. It has 55,520 miles on the odometer (dealer-reported, not independently verified by OAV). The exterior color is Black. It features a 4WD drivetrain with a 6.6L V8 engine and Automatic transmission.

OAV's independent, evidence-backed Price-to-Market analysis rates this vehicle as a Great Deal — priced below market value. Based on 10 comparable listings matched to this vehicle, the estimated market range is $62,999 to $63,948. These comparisons match year, make, model, and market, using trim where trim data supports it. OAV does not adjust comparables for odometer — where mileage would distort a verdict, it withholds one instead.

This vehicle has been on the lot for 13 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 Marietta, GA trucks market analysis. OAV compares vehicles using local and regional price-to-market ranges, days-on-lot, comparable count, and demand signals where available.

• View the full Marietta, GA trucks market →
• All vehicles in Marietta, GA →
• All vehicles in GA →
• All vehicles from this dealer →

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, using trim where trim data supports it. OAV does not adjust comparables for odometer; on very high-mileage vehicles it withholds a verdict rather than overstate a discount the odometer explains. 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 Marietta, GA, one of 57,000+ U.S. dealerships in OAV's nationwide inventory network.The VIN 1GT49PEY4MF299719 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 processed daily; Price-to-Market analysis uses comparable vehicles within the same geographic market.

2021 GMC Sierra 2500HD Market in GA

Based on all 54 2019-2023 GMC Sierra 2500HD listings in the GA market, the average asking price is $51,249. This listing at $54,800 is $3,551 above the broader GA average (7% above the GA average). This is a wider, all-trim comparison across GA; OAV's price verdict above uses the closer comparable set. Comparable prices in GA range from $37,407 to $61,015. Similar vehicles spend an average of 74 days on dealer lots in this market.

Similar GMC Sierra 2500HD Listings in GA

8 similar listings shown (closest matches within ±2 model years) and ±30,000 miles (subject trim: AT4 — compare trims below)