2021 GMC Sierra 1500 SLT

Owners selling privately get 8% to 10% less than dealers ask for the same trim, year and mileage. The low end is how the big pricing guides value a private sale (what buyers pay dealers, less a private-party discount); the high end is what private sellers’ asking prices and private-party sales show. A trade-in usually fetches less still.

Priced as SLT: 88 of the 89 cars we’ve seen with this VIN pattern are. Median of 550 final asking prices of this model & year (listings that ended), adjusted to 57k mi ($36,673 nationally), its history (No accidents +0.1%) and where it is (Texas −0.2%).

Accident, owner and title flags as reported in listings — not a full vehicle history report.