Make: Peterbilt Year: 2016 VIN Number: 1NPXD49X1GD305531 Condition: New Unit 51607 (Q16107) listed by iSellPro, for sale by Quad City Peterbilt - 2016 PETERBILT 389-131 TANDEM AXLE SLEEPER FOR SALE IN IOWA :: - PETERBILT 389-131 for Sale Engine: CUMMINS ISX 15 525 HP Transmission: 18 Spd. Axles: Tandem Suspension: Pete Flex Air Rear Ratio: 3.36