2021 GMC Sierra 1500 SLT

Listed by an independent dealer in Houston, TX · On lot for 11 days · VIN verifiable at NHTSA

This used 2021 GMC Sierra 1500 SLT is listed at $31,335 by vista cars and trucks in Houston, TX 77088. It has 70,398 miles on the odometer (dealer-reported, not independently verified by OAV). The exterior color is White. It features a RWD drivetrain with a 5.3L V8 engine and Automatic transmission.

OAV's independent, evidence-backed Price-to-Market analysis rates this vehicle as a Great Deal — priced below the supported comparable range. OAV has not assigned a reliable comparable market range for this vehicle yet — the available comparable evidence isn't sufficient for a reliable verdict.

This vehicle has been on the lot for 11 days.

Analysis powered by OAV's patented inventory standardization technology (U.S. Patent No. 12,236,477). Verdict methodology ptm-verdict-v1 · snapshot Sep 15, 2026. The patented comparable band is the input; ptm-verdict-v1 is the versioned OAV rule set that turns it into this verdict.

Market context

This listing is part of OAV's broader Houston, TX trucks market analysis. OAV compares vehicles by local and regional price-to-market ranges and comparable count; days-on-lot and demand signals are shown separately, not as verdict inputs.

• View the full Houston, TX trucks market →
• All vehicles in Houston, TX →
• All vehicles in TX →
• All vehicles from this dealer →

How this deal is rated

OAV compares this 2021 GMC Sierra 1500 against similar vehicles currently available for sale — same make, model, and year range, using trim where the data supports it. OAV does not adjust comparable prices for mileage; on used vehicles it withholds a verdict when mileage would distort the comparison — very high or unreliable mileage, or a lower price better explained by higher-than-typical mileage than by a genuine market discount — rather than overstate a deal. Based on where this listing falls in that comparable set, it is rated:

• Great Deal — priced below the comparable-range floor by a meaningful margin (OAV's minimum-gap rule); a listing below the floor by less than that margin is Fair Price.
• 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 can surface additional verification signals, but commercial participation never changes a listing's Price-to-Market verdict, eligibility, ranking, or confidence.

How this listing is verified

This vehicle listing was aggregated from an independent dealer in Houston, TX, one of 57,000+ U.S. dealerships in OAV's nationwide inventory network.The VIN 3GTP8DED6MG217404 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.

2021 GMC Sierra 1500 Market in TX

Based on all 1,390 2019-2023 GMC Sierra 1500 listings in the TX market, the average asking price is $37,806. This listing at $31,335 is $6,471 below the broader TX average (17% below the TX average). This is a wider, all-trim comparison across TX; OAV's price verdict above uses the closer comparable set. Comparable prices in TX range from $26,912 to $55,700. Similar vehicles spend an average of 171 days on dealer lots in this market.

Similar GMC Sierra 1500 Listings in TX

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

This is a broad, statewide same-model set (any trim, mileage, or title) — not the qualified comparable cohort behind the verdict above; lower prices here typically reflect a different trim, higher mileage, or a branded title.