2026 Peterbilt 579 X15 — Used Market Prices & Trends

The 2026 Peterbilt 579 powered by the X15 is currently represented by 32 active listings on TruckRadar, with a median asking price of $189,950 and median odometer reading of 1,002 miles. Over the past 90 days, asking prices have moved down 4.3%. Seasonal softening in the used truck market tends to occur as fleets delay purchasing decisions during slower freight periods. Most units listed are configured as conventional cab with tandem rear axle (6x4) drivetrains. Geographically, the largest concentrations of 2026 579 inventory sit in Texas, California, and Oklahoma, where regional pricing ranges from $165,900 to $386,977. Common transmission pairings include EEO-18F112C12 and EEO-16F112C12. The 2026 579 typically appears in dealer inventory for an average of 30 to 60 days before sale, based on TruckRadar listing turnover data. Buyers comparing this configuration often also evaluate the 567 and 589. Pricing reflects active asking prices from verified dealers and is not a substitute for a formal appraisal.

2026 Peterbilt 579 X15 — Frequently Asked Questions