2017 GMC Sierra 3500 HD Submodel: Crew Cab Pickup;BedLength: 78.8 In.; w/RPO Code FH0 (E10 Fuel Vehicle); w/RPO Code FJW (E15 Fuel Vehicle); w/RPO Code FHS (E85 Fuel Vehicle);. 2017 GMC Sierra 3500 HD Submodel: Extended Cab Pickup;BedLength: 78.8 In.; w/RPO Code FH0 (E10 Fuel Vehicle); w/RPO Code FJW (E15 Fuel Vehicle); w/RPO Code FHS (E85 Fuel Vehicle);.
