Recent Arrival! Allison 1000 6-Speed Automatic, 4WD. CARFAX One-Owner. 4D Crew Cab White 4WD Allison 1000 6-Speed Automatic Duramax 6.6L V8 Turbodiesel 60 DAY SATISFACTION GUARANTEE How does it work? The preowned vehicle must have less than 80,000 miles at the time of... via EveryCarListed.com