2019-2023 Chevrolet Silverado 1500/ GMC Sierra 1500 (EXCEPT ZR2 & AT4X) 6.2L V8 Automatic Transmission 2 & 4 Wheel Drive Extended Cab With Standard Bed (6' 7") 147.4" Wheelbase/ Crew Cab With Short Bed (5' 9") 147.4" Wheelbase. Factory Split Rear Exit Vehicles ONLY. Add Adapter 60706 For Crew Cab With Standard Bed (6' 7") 157" Wheelbase.