2025 GMC Sierra 1500 Price: $72,185 756 Smithtown Bypass, Smithtown, NY 11787 More Smithtown, NY GMC Sierra 1500's 2021 $37,995 23,247 Miles 2024 $82,140 Miles 2025 $66,820 Miles 2025 $67,190 Miles 2025 $57,790 Miles 2025 $66,735 Miles