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Foundation Chevrolet CADILLAC

Audi Parker

Larry H Miller Chrysler Dodge Ram FIAT Denver

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ClearShift

O'Meara GMC

Groove Toyota

Grand Valley Auto Sales Lakewood 6th Ave

Truck Ranch Frederick

Reds Auto & Truck

Victory Motors of Colorado

Skyline Mitsubishi

Mike Maroone Cadillac

Castle Rock Chevrolet GMC

AutoNation Buick GMC Park Meadows

Audi Flatirons

Interstate Ford

Private Seller Exchange

Spider

Fullsize Crew Cab

Truck

AWD4WD

8-Cylinder

Flexible Fuel

Used

Sierra 3500

SLE Preferred Package

Suspension Package, Off-Road

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Used 2013 GMC Sierra 3500 SLE w/ SLE Preferred Package

Used 2013 GMC Sierra 3500 SLE w/ SLE Preferred Package Thornton CO 80234

Automatic

8-Cylinder Turbo

Diesel

Technology Package

LPO, Cargo Convenience Package

Gooseneck/5TH Wheel Prep Package

LPO, GMC Protection Package

LPO, Hitch Package

Snow Plow Prep/Camper Package

New 2025 GMC Sierra 3500 Denali w/ Technology Package

New 2025 GMC Sierra 3500 Denali w/ Technology Package Littleton CO 80129

Denali

Used 2011 GMC Sierra 3500 Denali

Used 2011 GMC Sierra 3500 Denali Longmont CO 80504

Denali Reserve Package

Used 2024 GMC Sierra 3500 Denali w/ Denali Reserve Package

Used 2024 GMC Sierra 3500 Denali w/ Denali Reserve Package Lakewood CO 80214

6-Cylinder Turbo

Sierra 1500

Used 2021 GMC Sierra 1500 AT4

Used 2021 GMC Sierra 1500 AT4 Littleton CO 80129

Used 2024 GMC Sierra 3500 Denali Ultimate

Used 2024 GMC Sierra 3500 Denali Ultimate Castle Rock CO 80104

Denali Ultimate

Used 2025 GMC Sierra 3500 Denali Ultimate

Used 2025 GMC Sierra 3500 Denali Ultimate Lone Tree CO 80124

Certified

Certified 2025 GMC Sierra 3500 Denali w/ Denali Reserve Package

Certified 2025 GMC Sierra 3500 Denali w/ Denali Reserve Package Wheat Ridge CO 80033

Used 2023 GMC Sierra 3500 Denali

Used 2023 GMC Sierra 3500 Denali Denver CO 80014

Gasoline

Used 2024 GMC Sierra 1500 Denali w/ Denali Reserve Package

Used 2024 GMC Sierra 1500 Denali w/ Denali Reserve Package Littleton CO 80129

Used 2024 GMC Sierra 3500 Denali

Used 2024 GMC Sierra 3500 Denali Littleton CO 80129

SLE Value Package

Preferred Package

Sierra HD Pro Safety Plus Package

X31 Off-Road Package

New 2025 GMC Sierra 3500 SLE w/ SLE Value Package

New 2025 GMC Sierra 3500 SLE w/ SLE Value Package Loveland CO 80538

New 2025 GMC Sierra 3500 Denali w/ Denali Reserve Package

New 2025 GMC Sierra 3500 Denali w/ Denali Reserve Package Castle Rock CO 80104

Denali Ultimate Package

Used 2022 GMC Sierra 3500 Denali w/ Denali Ultimate Package

Used 2022 GMC Sierra 3500 Denali w/ Denali Ultimate Package Littleton CO 80129

New 2025 GMC Sierra 3500 Denali Ultimate

New 2025 GMC Sierra 3500 Denali Ultimate Littleton CO 80129

Convenience Package

Skid Plate Package, Frame-Mounted Shields

Used 2008 GMC Sierra 3500 SLT w/ Convenience Package

Used 2008 GMC Sierra 3500 SLT w/ Convenience Package Longmont CO 80501

Fullsize

Sport Utility

Yukon XL

Used 2022 GMC Yukon XL AT4

Used 2022 GMC Yukon XL AT4 Littleton CO 80129

Used 2021 GMC Sierra 1500 Elevation w/ Preferred Package

Used 2021 GMC Sierra 1500 Elevation w/ Preferred Package Littleton CO 80129

Elevation

SLT Premium Plus Package

Max Trailering Package

Used 2022 GMC Sierra 1500 SLT w/ SLT Premium Plus Package

Used 2022 GMC Sierra 1500 SLT w/ SLT Premium Plus Package Littleton CO 80129

AT4 Premium Package

Gooseneck/5TH Wheel Package

Driver Alert Package II

Used 2020 GMC Sierra 3500 AT4 w/ AT4 Premium Package

Used 2020 GMC Sierra 3500 AT4 w/ AT4 Premium Package Boulder CO 80301

Used 2019 GMC Sierra 1500 SLT w/ SLT Premium Plus Package

Used 2019 GMC Sierra 1500 SLT w/ SLT Premium Plus Package Littleton CO 80129

Used 2020 GMC Sierra 3500 AT4 w/ AT4 Premium Package Henderson CO 80640

Used 2024 GMC Sierra 3500 HD Crew Cab AT4 Pickup 4D 6 1/2 ft

AT4 Premium Plus Package

Used 2024 GMC Sierra 3500 AT4 w/ AT4 Premium Plus Package

Used 2024 GMC Sierra 3500 AT4 w/ AT4 Premium Plus Package Parker CO 80134

Duramax Plus Package

Used 2019 GMC Sierra 3500 Denali w/ Duramax Plus Package

Used 2019 GMC Sierra 3500 Denali w/ Duramax Plus Package Longmont CO 80504

Used 2021 GMC Sierra 3500 Denali w/ Denali Ultimate Package

Used 2021 GMC Sierra 3500 Denali w/ Denali Ultimate Package Wheat Ridge CO 80033

Heavy Duty Front Spring/Camper Package

Used 2024 GMC Sierra 3500 Denali Ultimate Golden CO 80401

Used 2023 GMC Sierra 3500 AT4 w/ AT4 Premium Plus Package

Used 2023 GMC Sierra 3500 AT4 w/ AT4 Premium Plus Package Denver CO 80234

Used 2020 GMC Sierra 3500 AT4 w/ AT4 Premium Package Highlands Ranch CO 80126

Used 2024 GMC Sierra 3500 Denali w/ Technology Package

Used 2024 GMC Sierra 3500 Denali w/ Technology Package Loveland CO 80537

AT4 Preferred Package

Used 2024 GMC Sierra 3500 AT4 w/ AT4 Preferred Package

Used 2024 GMC Sierra 3500 AT4 w/ AT4 Preferred Package Highlands Ranch CO 80126

All-Terrain HD Package, For Crew Cab Models Only

Gooseneck/5TH Wheel Prep Package -- Hitch Platform to Accept Gooseneck or Fifth Wheel Hitch.

LPO, Hitch Package, Gooseneck Ball and Chain Tiedown Kit With Case

Used 2018 GMC Sierra 3500 SLT w/ Duramax Plus Package

Used 2018 GMC Sierra 3500 SLT w/ Duramax Plus Package Highlands Ranch CO 80126

Used 2019 GMC Sierra 1500 Denali w/ Technology Package

Used 2019 GMC Sierra 1500 Denali w/ Technology Package Littleton CO 80129

Used 2022 GMC Sierra 3500 Denali

Used 2022 GMC Sierra 3500 Denali Centennial CO 80112

Midsize

4-Cylinder Turbo

Terrain

Elevation Edition

License Plate Front Mounting Package

Used 2020 GMC Terrain SLE w/ Elevation Edition

Used 2020 GMC Terrain SLE w/ Elevation Edition Littleton CO 80129

Used 2020 GMC Sierra 3500 AT4 w/ AT4 Premium Package Englewood CO 80113

Used 2020 GMC Sierra 3500 Denali w/ Denali Ultimate Package

Used 2020 GMC Sierra 3500 Denali w/ Denali Ultimate Package Henderson CO 80640

Used 2024 GMC Sierra 3500 Denali Ultimate Frederick CO 80504

Used 2025 GMC Sierra 3500 AT4 w/ AT4 Premium Plus Package

Used 2025 GMC Sierra 3500 AT4 w/ AT4 Premium Plus Package Frederick CO 80504

Used 2022 GMC Sierra 3500 AT4 w/ AT4 Premium Plus Package

Used 2022 GMC Sierra 3500 AT4 w/ AT4 Premium Plus Package Parker CO 80134

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Loveland Buick GMC

Denver

Used Cars for Sale

Test drive Used GMC Sierra 3500 at home in Denver, CO. Search from 68 Used GMC Sierra 3500 cars for sale, including a  2008 GMC Sierra 3500 SLT, a  2011 GMC Sierra 3500 Denali, and a  2013 GMC Sierra 3500 SLE ranging in price from $21,999 to $93,999.

Used GMC Sierra 3500 for Sale in Denver, CO - Autotrader

Used GMC Sierra 3500 for Sale Under $10,000

Used GMC Sierra 3500 for Sale Under $20,000

Search from 68 GMC Sierra 3500 for sale, including a Certified 2025 GMC Sierra 3500 Denali w/ Denali Reserve Package, a Used 2008 GMC Sierra 3500 SLT w/ Convenience Package, and a Used 2011 GMC Sierra 3500 Denali ranging in price from $21,999 to $93,999.

Autotrader has 68 GMC Sierra 3500 for sale near Denver, CO, including a Certified 2025 GMC Sierra 3500 Denali w/ Denali Reserve Package, a Used 2008 GMC Sierra 3500 SLT w/ Convenience Package, and a Used 2011 GMC Sierra 3500 Denali ranging in price from $21,999 to $93,999.

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Used GMC Sierra 3500 for Sale in Denver, CO

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Used 2022 GMC Sierra 3500 Denali w/ Denali Ultimate Package

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2025 GMC Sierra 3500

2024 GMC Sierra 3500

2021 GMC Sierra 3500