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Used

Sierra 2500

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Used 1994 GMC Sierra 2500 4x4 Extended Cab

Used 1994 GMC Sierra 2500 4x4 Extended Cab Lakewood CO 80227

Automatic

4x4 Extended Cab

Fullsize Crew Cab

Gooseneck/5th Wheel Prep Package

LPO, Hitch Package

New 2025 GMC Sierra 2500 Denali Ultimate

New 2025 GMC Sierra 2500 Denali Ultimate Littleton CO 80129

Denali Ultimate

Max Trailering Package

New 2025 GMC Sierra 2500 Denali Ultimate w/ Max Trailering Package

New 2025 GMC Sierra 2500 Denali Ultimate w/ Max Trailering Package Castle Rock CO 80104

Used 2024 GMC Sierra 2500 Denali Ultimate w/ Max Trailering Package

Used 2024 GMC Sierra 2500 Denali Ultimate w/ Max Trailering Package Denver CO 80221

SLT Premium Package

Used 2024 GMC Sierra 2500 SLT w/ SLT Premium Package

Used 2024 GMC Sierra 2500 SLT w/ SLT Premium Package Denver CO 80221

8-Cylinder

Gasoline

Denali Ultimate Package

Snow Plow Prep/Camper Package

Used 2022 GMC Sierra 2500 Denali w/ Denali Ultimate Package

Used 2022 GMC Sierra 2500 Denali w/ Denali Ultimate Package Boulder CO 80301

Denali

Gooseneck/5TH Wheel Package

Driver Alert Package II

LPO, GMC Protection Package

X31 Off-Road Package

Used 2021 GMC Sierra 2500 SLT w/ SLT Premium Package

Used 2021 GMC Sierra 2500 SLT w/ SLT Premium Package Aurora CO 80011

LPO, Denali Illumination Package

Used 2022 GMC Sierra 2500 Denali w/ Denali Ultimate Package Aurora CO 80012

Suspension Package, Off-Road

Used 2013 GMC Sierra 2500 Denali w/ Suspension Package, Off-Road

Used 2013 GMC Sierra 2500 Denali w/ Suspension Package, Off-Road Englewood CO 80110

Used 2020 GMC Sierra 2500 Denali w/ Denali Ultimate Package

Used 2020 GMC Sierra 2500 Denali w/ Denali Ultimate Package Broomfield CO 80020

Used 2022 GMC Sierra 2500 Denali

Used 2022 GMC Sierra 2500 Denali Castle Rock CO 80104

AT4 Premium Plus Package

Used 2022 GMC Sierra 2500 AT4 w/ AT4 Premium Plus Package

Used 2022 GMC Sierra 2500 AT4 w/ AT4 Premium Plus Package Aurora CO 80012

New 2025 GMC Sierra 2500 AT4X

New 2025 GMC Sierra 2500 AT4X Littleton CO 80129

AT4X

Denali Reserve Package

New 2025 GMC Sierra 2500 Denali w/ Denali Reserve Package

New 2025 GMC Sierra 2500 Denali w/ Denali Reserve Package Loveland CO 80538

Used 2021 GMC Sierra 2500 Denali w/ Denali Ultimate Package

Used 2021 GMC Sierra 2500 Denali w/ Denali Ultimate Package Littleton CO 80129

Third-Party Certified

<div class="text-bold text-default margin-top-3 col-xs-12 margin-bottom-5">Confidence at Every Turn.</div><div class="col-xs-12"><ul><li>139-Point Inspection by Factory-Trained Technicians</li><li>90-Day/4,000-Mile (whichever comes first) Comprehensive Warranty¹</li><li>Nationwide Dealer Network for Service and Accessories</li><li>Complimentary 24/7 Roadside Assistance²</li><li>CARFAX® Vehicle History Report³</li><li>11,000 FordPass™ Rewards Points⁴ to Use Toward Your First Maintenance Visit</li></ul><p>Exceptional Coverage Comes Standard.</p></div><div class="margin-top-4 text-size-200 text-subdued col-xs-12"><div class="padding-bottom-4">Disclaimer</div><div class="text-size-100"><sup>1</sup> See your dealer for warranty coverage details.</br><sup>2</sup> See your dealer for coverage details. Roadside Assistance is included for certain owners and available to everyone for a per-service fee. Ford reserves the right to change program details without obligations.</br><sup>3</sup> CARFAX® is a registered trademark of CARFAX® Inc.<br/><sup>4</sup> FordPass App, compatible with select smartphone platforms, is available via a download. Message and data rates may apply.</div></div>

Ford Blue Advantage - Blue Certified

Used 2024 GMC Sierra 2500 Denali Ultimate w/ Snow Plow Prep/Camper Package

Used 2024 GMC Sierra 2500 Denali Ultimate w/ Snow Plow Prep/Camper Package Littleton CO 80123

Used 2006 GMC Sierra 2500 HD Crew Cab SLT Pickup 4D 6 1/2 ft

Heavy-Duty Power Package

Onstar Plus Package

Skid Plate Package

Used 2006 GMC Sierra 2500 SLT w/ Heavy-Duty Power Package

Used 2006 GMC Sierra 2500 SLT w/ Heavy-Duty Power Package Englewood CO 80110

LPO, Cargo Convenience Package

Used 2024 GMC Sierra 2500 Denali Ultimate

Used 2024 GMC Sierra 2500 Denali Ultimate Littleton CO 80123

New 2026 GMC Sierra 2500 Denali w/ Denali Reserve Package

New 2026 GMC Sierra 2500 Denali w/ Denali Reserve Package Littleton CO 80129

1SA Pro Safety Plus Package

Convenience Package

Used 2024 GMC Sierra 2500 Pro w/ 1SA Pro Safety Plus Package

Used 2024 GMC Sierra 2500 Pro w/ 1SA Pro Safety Plus Package Littleton CO 80121

New 2026 GMC Sierra 2500 Denali Ultimate w/ Max Trailering Package

New 2026 GMC Sierra 2500 Denali Ultimate w/ Max Trailering Package Littleton CO 80129

Used 2021 GMC Sierra 2500 AT4

Used 2021 GMC Sierra 2500 AT4 Denver CO 80227

Used 2024 GMC Sierra 2500 AT4 w/ AT4 Premium Plus Package

Used 2024 GMC Sierra 2500 AT4 w/ AT4 Premium Plus Package Littleton CO 80122

Certified

Certified 2023 GMC Sierra 2500 AT4

Certified 2023 GMC Sierra 2500 AT4 Brighton CO 80601

New 2026 GMC Sierra 2500 AT4 w/ AT4 Premium Plus Package

New 2026 GMC Sierra 2500 AT4 w/ AT4 Premium Plus Package Littleton CO 80129

Used 2024 GMC Sierra 2500 Denali Ultimate Littleton CO 80129

Used 2016 GMC Sierra 2500 HD Crew Cab Denali Pickup 4D 6 1/2 ft

Duramax Plus Package

Gooseneck/5TH Wheel Prep Package

Used 2016 GMC Sierra 2500 Denali w/ Duramax Plus Package

Used 2016 GMC Sierra 2500 Denali w/ Duramax Plus Package Aurora CO 80017

Driver Alert Package I

Used 2021 GMC Sierra 2500 SLT w/ Gooseneck/5TH Wheel Package

Used 2021 GMC Sierra 2500 SLT w/ Gooseneck/5TH Wheel Package Denver CO 80221

AT4 Premium Package

Technology Package

Used 2020 GMC Sierra 2500 AT4 w/ AT4 Premium Package

Used 2020 GMC Sierra 2500 AT4 w/ AT4 Premium Package Castle Rock CO 80104

New 2025 GMC Sierra 2500 Pro w/ 1SA Pro Safety Plus Package

New 2025 GMC Sierra 2500 Pro w/ 1SA Pro Safety Plus Package Littleton CO 80129

Used 2017 GMC Sierra 2500 Denali w/ Duramax Plus Package

Used 2017 GMC Sierra 2500 Denali w/ Duramax Plus Package Littleton CO 80123

Used 2021 GMC Sierra 2500 Denali w/ Denali Ultimate Package Wheat Ridge CO 80033

Used 2024 GMC Sierra 2500 Denali Ultimate Littleton CO 80121

Used 2020 GMC Sierra 2500 Denali w/ Denali Ultimate Package Highlands Ranch CO 80126

Used 2021 GMC Sierra 2500 Denali w/ Denali Ultimate Package Golden CO 80401

Used 2024 GMC Sierra 2500 AT4 w/ AT4 Premium Plus Package Littleton CO 80129

Used 2021 GMC Sierra 2500 Denali w/ Denali Ultimate Package Thornton CO 80233

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Denver

Used Cars for Sale

Test drive Used GMC Sierra 2500 at home in Denver, CO. Search from 123 Used GMC Sierra 2500 cars for sale, including a  1994 GMC Sierra 2500 4x4 Extended Cab, a  2006 GMC Sierra 2500 SLT, and a  2013 GMC Sierra 2500 Denali ranging in price from $12,980 to $89,999.

Used GMC Sierra 2500 for Sale in Denver, CO - Autotrader

The GMC Sierra 2500 is an intriguing mix of heavy-hitting workhorse and glitzy luxury. With powerful <a href="https://www.autotrader.com/cars-for-sale/diesel/gmc/sierra-2500" target="_blank">diesel</a> or <a href="https://www.autotrader.com/cars-for-sale/gasoline/gmc/sierra-2500" target="_blank">gasoline</a> powertrain options, the Sierra 2500 has immense towing and hauling capacity. The 2500 has well-mannered on-road handling and is equally at home on a dirt ranch road.  The configurations with the Sierra 2500 are nearly endless, with multiple cab sizes, bed lengths, and an array of powertrain choices. Some of the popular Sierra 2500 trims include the <a href="https://www.autotrader.com/cars-for-sale/gmc/sierra-2500/at4" target="_blank">AT4</a>, <a href="https://www.autotrader.com/cars-for-sale/gmc/sierra-2500/denali" target="_blank">Denali</a>, <a href="https://www.autotrader.com/cars-for-sale/gmc/sierra-2500/denali-ultimate" target="_blank">Denali Ultimate</a>, <a href="https://www.autotrader.com/cars-for-sale/gmc/sierra-2500/sle" target="_blank">SLE</a>, and <a href="https://www.autotrader.com/cars-for-sale/gmc/sierra-2500/slt" target="_blank">SLT</a>. Even with fierce competition in the heavy-duty pickup segment, the GMC Sierra 2500 still makes waves. With powerful towing capabilities, a luxurious interior, and refined on-road driving, the Sierra 2500 is a rewarding heavy-duty truck.  

Used GMC Sierra 2500 for Sale Under $30,000

Used GMC Sierra 2500 for Sale Under $20,000

Used GMC Sierra 2500 for Sale Under $15,000

Used GMC Sierra 2500 for Sale Under $5,000

Used GMC Sierra 2500 for Sale Under $25,000

Used GMC Sierra 2500 for Sale Under $10,000

Search from 123 GMC Sierra 2500 for sale, including a Certified 2023 GMC Sierra 2500 AT4, a Used 2006 GMC Sierra 2500 SLT w/ Heavy-Duty Power Package, and a Used 2013 GMC Sierra 2500 Denali w/ Suspension Package, Off-Road ranging in price from $12,980 to $89,999.

Autotrader has 123 GMC Sierra 2500 for sale near Denver, CO, including a Certified 2023 GMC Sierra 2500 AT4, a Used 2006 GMC Sierra 2500 SLT w/ Heavy-Duty Power Package, and a Used 2013 GMC Sierra 2500 Denali w/ Suspension Package, Off-Road ranging in price from $12,980 to $89,999.

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Used GMC Sierra 2500 for Sale in Denver, CO

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Used 2021 GMC Sierra 2500 Denali w/ Denali Ultimate Package

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2022 GMC Sierra 2500

2022 GMC Sierra 2500

1994 GMC Sierra 2500