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5 used GMC trucks for sale in Longmont, CO

White 2022 GMC Sierra 2500HD 4WD Crew Cab Long Bed Pro for sale in Longmont, COPhotos of 2022 GMC Sierra 2500HD 4WD Crew Cab Long Bed Pro for sale in Longmont, CO at Red's Auto & TruckAnother view of 2022 GMC Sierra 2500HD 4WD Crew Cab Long Bed Pro for sale in Longmont, CO at Red's Auto & TruckMore photos of 2022 GMC Sierra 2500HD 4WD Crew Cab Long Bed Pro at Red's Auto & Truck, COMore photos of 2022 GMC Sierra 2500HD 4WD Crew Cab Long Bed Pro at Red's Auto & Truck, CO
Stock # 2026-115

2022 GMC Sierra 2500HD

4WD Crew Cab Long Bed Pro
139,864 miles
was $37,799
$36,963
Est. Payment
$546/mo
White 2023 GMC Sierra 3500HD 4WD Crew Cab Long Bed Pro for sale in Longmont, COPhotos of 2023 GMC Sierra 3500HD 4WD Crew Cab Long Bed Pro for sale in Longmont, CO at Red's Auto & TruckAnother view of 2023 GMC Sierra 3500HD 4WD Crew Cab Long Bed Pro for sale in Longmont, CO at Red's Auto & TruckMore photos of 2023 GMC Sierra 3500HD 4WD Crew Cab Long Bed Pro at Red's Auto & Truck, COMore photos of 2023 GMC Sierra 3500HD 4WD Crew Cab Long Bed Pro at Red's Auto & Truck, CO
Stock # 2025-607

2023 GMC Sierra 3500HD

4WD Crew Cab Long Bed Pro
73,045 miles
was $46,999
$46,763
Est. Payment
$690/mo
White 2017 GMC Sierra 3500HD Denali for sale in Longmont, COPhotos of 2017 GMC Sierra 3500HD Denali for sale in Longmont, CO at Red's Auto & TruckAnother view of 2017 GMC Sierra 3500HD Denali for sale in Longmont, CO at Red's Auto & TruckMore photos of 2017 GMC Sierra 3500HD Denali at Red's Auto & Truck, COMore photos of 2017 GMC Sierra 3500HD Denali at Red's Auto & Truck, CO
Stock # 2026-024

2017 GMC Sierra 3500HD

Denali
71,374 miles
was $49,999
$48,963
Est. Payment
$723/mo
White 2024 GMC Sierra 3500HD 4WD Crew Cab Long Bed Denali for sale in Longmont, COPhotos of 2024 GMC Sierra 3500HD 4WD Crew Cab Long Bed Denali for sale in Longmont, CO at Red's Auto & TruckAnother view of 2024 GMC Sierra 3500HD 4WD Crew Cab Long Bed Denali for sale in Longmont, CO at Red's Auto & TruckMore photos of 2024 GMC Sierra 3500HD 4WD Crew Cab Long Bed Denali at Red's Auto & Truck, COMore photos of 2024 GMC Sierra 3500HD 4WD Crew Cab Long Bed Denali at Red's Auto & Truck, CO
Stock # 2026-109

2024 GMC Sierra 3500HD

4WD Crew Cab Long Bed Denali
124,976 miles
was $59,999
$57,963
Est. Payment
$855/mo
White 2021 GMC Sierra 2500HD 4WD Crew Cab Long Bed SLE for sale in Longmont, COPhotos of 2021 GMC Sierra 2500HD 4WD Crew Cab Long Bed SLE for sale in Longmont, CO at Red's Auto & TruckAnother view of 2021 GMC Sierra 2500HD 4WD Crew Cab Long Bed SLE for sale in Longmont, CO at Red's Auto & TruckMore photos of 2021 GMC Sierra 2500HD 4WD Crew Cab Long Bed SLE at Red's Auto & Truck, COMore photos of 2021 GMC Sierra 2500HD 4WD Crew Cab Long Bed SLE at Red's Auto & Truck, CO
Stock # 2025-526

2021 GMC Sierra 2500HD

4WD Crew Cab Long Bed SLE
97,493 miles
was $34,999
$33,863
Est. Payment
$500/mo
Showing 5 of 5 results

Disclaimer:

Prices do not include government fees and taxes, any finance charges, any electronic filing charge and any emission testing charge. We update our website inventory frequently, but our inventory changes with recent sales. Mileage may change slightly due to test drives. We are not responsible for any errors or omissions on this page. Please feel free to call us before you visit.