CURT Manufacturing 16204 Features: Drill Required Height: 2.00 Width: 7.00 Length: 45.00 Fitment: 2017/GMC/Sierra 1500/SLT Extended Cab Pickup 4-Door/6.2L 6162CC 376Cu. In. V8 GAS OHV Naturally Aspirated::Drilling Not Required~ To Be Used In Combination w/PN[16104]/[16204] Rails~ Rail Mounting Hardware Included^^2017/GMC/Sierra 1500/SLT Extended Cab Pickup 4-Door/5.3L 5328CC 325Cu. In. V8 GAS OHV Naturally Aspirated::Drilling Not Required~ To Be Used In Combination w/PN[16104]/[16204] Rails~ Rail Mounting Hardware Included^^2017/GMC/Sierra 1500/SLT Extended Cab Pickup 4-Door/5.3L 5328CC 325Cu. In. V8 FLEX OHV Naturally Aspirated::Drilling Not Required~ To Be Used In Combination w/PN[16104]/[16204] Rails~ Rail Mounting Hardware Included^^2017/GMC/Sierra 1500/SLT Crew Cab Pickup 4-Door/6.2L 6162CC 376Cu. In. V8 GAS OHV Naturally Aspirated::Drilling Not ...