C3500 8 C-Series Topkick 2 Envoy 8 Jimmy 8 Motorhome Chassis 2 Safari 11 Savana 1500 8 Savana 2500 9 Savana 3500 9 School Bus Chassis 2 Sierra 1500 12 Sierra 1500 HD 10 Sierra 2500 11 Sierra 2500 HD 14 Sierra 3500 14 Sierra Denali 9 Sonoma 10 T-Series 3 W3500 Forward 10 W4500 Forward 11 W5500 Forward 12 W6 3 W7 2 Yukon 11 Yukon Denali 11 Yukon Denali XL 10 Yukon XL 1500 8 Yukon XL 2500 8