Bushwacker 40966-02 Extend-A-Fender Flares Fits Sierra 2500 HD Sierra 3500 HD Height: 34.380 Width: 11.000 Length: 52.000 Weight: 19.85 Fitment: 2017/GMC/Sierra 3500 HD/SLT Extended Cab Pickup 4-Door/6.6L 6599CC 403Cu. In. V8 DIESEL OHV Turbocharged::Bed Side = Fleetside, Front and RearFactory Mud Flaps Must Be Removed^^2017/GMC/Sierra 3500 HD/SLT Extended Cab Pickup 4-Door/6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated::Bed Side = Fleetside, Front and RearFactory Mud Flaps Must Be Removed^^2017/GMC/Sierra 3500 HD/SLT Extended Cab Pickup 4-Door/6.0L 5967CC 364Cu. In. V8 FLEX OHV Naturally Aspirated::Bed Side = Fleetside, Front and RearFactory Mud Flaps Must Be Removed^^2017/GMC/Sierra 3500 HD/SLT Crew Cab Pickup 4-Door/6.6L 6599CC 403Cu. In. V8 DIESEL OHV Turbocharged::Bed Side = Fleetside, Front and RearFactory Mud Flaps Must Be Removed^^2017/GMC/Sierra 3500 HD/SLT Crew Cab Pickup 4-Door/6.0L 5967C...