Sierra SL Extended Cab Pickup 2-Door 11 Sierra SL Extended Cab Pickup 3-Door 12 Sierra SL Standard Cab Pickup 2-Door 12 Sierra SLE Extended Cab Pickup 2-Door 12 Sierra SLE Extended Cab Pickup 3-Door 12 Sierra SLE Standard Cab Pickup 2-Door 12 Sierra SLT Extended Cab Pickup 2-Door 12 Sierra SLT Extended Cab Pickup 3-Door 12 Sierra SLT Standard Cab Pickup 2-Door 12 Sierra Special Standard Cab Pickup 2-Door 12