2021 GMC Sierra 3500HD Denali 4×4 Crew Cab 8 ft. box 172 in. WB DRW
2021 GMC Terrain SL Front-wheel Drive
2021 GMC Terrain SLE Front-wheel Drive
2021 GMC Terrain SLE All-wheel Drive
2021 GMC Terrain SLT Front-wheel Drive
2021 GMC Terrain SLT All-wheel Drive
2021 GMC Sierra 3500HD Base 4×4 Crew Cab 8 ft. box 172 in. WB DRW
2021 GMC Sierra 3500HD SLE 4×2 Crew Cab 6.75 ft. box 158.9 in. WB SRW
2021 GMC Sierra 3500HD SLE 4×2 Crew Cab 8 ft. box 172 in. WB SRW
2021 GMC Sierra 3500HD SLE 4×4 Regular Cab 8 ft. box 141.6 in. WB DRW