Ed Carroll Volkswagen

ClearShift

Ken Garff Ford Fort Collins

Victory Motors of Colorado

Reds Auto & Truck

Truck Ranch Frederick

O'Meara Ford

Weld County Garage

Audi Flatirons

Ken Garff Ford Greeley

Private Seller Exchange

Interstate Ford

Mike Maroone Cadillac

Loveland Ford Lincoln

O'Meara GMC

Skyline Mitsubishi

Country Truck & Auto

Halladay Motors Inc

JOHNSON AUTO PLAZA

Berkenkotter Motors

Spider

Fullsize Crew Cab

Truck

AWD4WD

8-Cylinder

Flexible Fuel

Used

Sierra 3500

SLE Preferred Package

Suspension Package, Off-Road

Get AutoCheck Vehicle History

Used 2013 GMC Sierra 3500 SLE w/ SLE Preferred Package

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

Automatic

Gasoline

Sierra Convenience Package

Used 2015 GMC Sierra 3500 2WD Regular Cab w/ Sierra Convenience Package

Used 2015 GMC Sierra 3500 2WD Regular Cab w/ Sierra Convenience Package Fort Lupton CO 80621

2WD Regular Cab

8-Cylinder Turbo

Diesel

Used 2011 GMC Sierra 3500 Denali

Used 2011 GMC Sierra 3500 Denali Longmont CO 80504

Denali

Denali Reserve Package

Gooseneck/5TH Wheel Prep Package

LPO, GMC Protection Package

LPO, Hitch Package

New 2025 GMC Sierra 3500 Denali w/ Denali Reserve Package

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

Compact

Sport Utility

4-Cylinder Turbo

Hyundai

Tucson

Used 2016 Hyundai Tucson Eco

Used 2016 Hyundai Tucson Eco Loveland CO 80538

SLT Premium Package

X31 Off-Road and Protection Package

Gooseneck/5TH Wheel Package

Used 2021 GMC Sierra 3500 SLT w/ SLT Premium Package

Used 2021 GMC Sierra 3500 SLT w/ SLT Premium Package Dacono CO 80514

Midsize

Sedan

Chevrolet

Malibu

Premier Sun and Wheel Package

Driver Confidence Package

Driver Confidence Package II

Used 2017 Chevrolet Malibu Premier w/ Premier Sun and Wheel Package

Used 2017 Chevrolet Malibu Premier w/ Premier Sun and Wheel Package Loveland CO 80538

Premier

Used 2017 GMC Sierra 3500 HD Crew Cab SLT Pickup 4D 8 ft

Used 2017 GMC Sierra 3500 SLT

Used 2017 GMC Sierra 3500 SLT Livermore CO 80536

Denali Ultimate Package

Used 2023 GMC Sierra 3500 Denali w/ Denali Ultimate Package

Used 2023 GMC Sierra 3500 Denali w/ Denali Ultimate Package Greeley CO 80634

Used 2025 GMC Sierra 3500 Denali Ultimate

Used 2025 GMC Sierra 3500 Denali Ultimate Greeley CO 80634

Denali Ultimate

Used 2022 GMC Sierra 3500 Denali w/ Denali Ultimate Package

Used 2022 GMC Sierra 3500 Denali w/ Denali Ultimate Package Greeley CO 80634

4-Cylinder

Jeep

Renegade

Used 2021 Jeep Renegade Sport

Used 2021 Jeep Renegade Sport Loveland CO 80538

Sport

Sorento

Panoramic Sunroof Package

Used 2023 Kia Sorento S w/ Panoramic Sunroof Package

Used 2023 Kia Sorento S w/ Panoramic Sunroof Package Loveland CO 80538

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

Used 2024 GMC Sierra 3500 Denali Ultimate

Used 2024 GMC Sierra 3500 Denali Ultimate Greeley CO 80634

Kona

Used 2020 Hyundai Kona Limited

Used 2020 Hyundai Kona Limited Loveland CO 80538

Limited

Sierra 1500

Used 2016 GMC Sierra 1500 Denali w/ Denali Ultimate Package

Used 2016 GMC Sierra 1500 Denali w/ Denali Ultimate Package Loveland CO 80538

New 2025 GMC Sierra 3500 Denali Ultimate

New 2025 GMC Sierra 3500 Denali Ultimate Loveland CO 80538

Used 2022 GMC Sierra 3500 SLT

Used 2022 GMC Sierra 3500 SLT Broomfield CO 80020

AT4 Preferred Package

Technology Package

Driver Alert Package I

Driver Alert Package II

Used 2023 GMC Sierra 3500 AT4 w/ AT4 Preferred Package

Used 2023 GMC Sierra 3500 AT4 w/ AT4 Preferred Package Fort Collins CO 80525

Buick

Envision

Comfort And Convenience Package

Used 2025 Buick Envision Sport Touring

Used 2025 Buick Envision Sport Touring Loveland CO 80538

Sport Touring

AT4 Premium Package

Used 2020 GMC Sierra 3500 AT4 w/ AT4 Premium Package

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

Subaru

Ascent

Used 2024 Subaru Ascent Limited

Used 2024 Subaru Ascent Limited Loveland CO 80538

Luxury

6-Cylinder

Lexus

RX 350L

Premium Package

Used 2019 Lexus RX 350L w/ Premium Package

Used 2019 Lexus RX 350L w/ Premium Package Loveland CO 80538

w/ Premium Package

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 2020 GMC Sierra 3500 Denali w/ Denali Ultimate Package

Used 2020 GMC Sierra 3500 Denali w/ Denali Ultimate Package Fort Collins CO 80525

Used 2024 GMC Sierra 3500 Denali w/ Denali Reserve Package

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

SLE Convenience Package

Remote Start Package

X31 Off-Road Package

Used 2024 GMC Sierra 3500 SLE w/ SLE Convenience Package

Used 2024 GMC Sierra 3500 SLE w/ SLE Convenience Package Loveland CO 80537

AT4 Premium Plus Package

LPO, Cargo Convenience Package

Heavy Duty Front Spring/Camper Package

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

Compact Crew Cab

Nissan

Frontier

SV Convenience Package

Used 2024 Nissan Frontier SV w/ SV Convenience Package

Used 2024 Nissan Frontier SV w/ SV Convenience Package Loveland CO 80538

Rogue Sport

Used 2020 Nissan Rogue Sport S

Used 2020 Nissan Rogue Sport S Loveland CO 80538

Used 2024 GMC Sierra 3500 Denali w/ Technology Package

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

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

Used 2024 GMC Sierra 3500 AT4 w/ AT4 Premium Plus Package Loveland CO 80537

Used 2016 Chevrolet Malibu LS

Used 2016 Chevrolet Malibu LS Loveland CO 80538

Used 2020 GMC Sierra 3500 AT4 w/ AT4 Premium Package Denver CO 80234

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 2020 GMC Sierra 3500 Denali w/ Denali Ultimate Package Greeley CO 80634

Castle Rock Chevrolet GMC

2 Mazda

Loveland Buick GMC

Denver

Used Cars for Sale

Shop, watch video walkarounds and compare prices on Used GMC Sierra 3500 listings in Fort Collins, CO. See Kelley Blue Book pricing to get the best deal. Search from 43 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 $7,988 to $93,999.

Used GMC Sierra 3500 for Sale in Fort Collins, CO - Kelley Blue Book

Search from 43 GMC Sierra 3500 for sale, including a Used 2008 GMC Sierra 3500 SLT w/ Convenience Package, a Used 2011 GMC Sierra 3500 Denali, and a Used 2013 GMC Sierra 3500 SLE w/ SLE Preferred Package ranging in price from $7,988 to $93,999.

Autotrader has 43 GMC Sierra 3500 for sale near Fort Collins, CO, including a Used 2008 GMC Sierra 3500 SLT w/ Convenience Package, a Used 2011 GMC Sierra 3500 Denali, and a Used 2013 GMC Sierra 3500 SLE w/ SLE Preferred Package ranging in price from $7,988 to $93,999.

Frankie Rogers is a senior editor for Kelley Blue Book and focuses on the production of content. She edits and formats content, creates monthly deals lists, is a media asset curator, and photographs cars for various articles and inclusion in KBB’s image library. Her 16+ years at Kelley Blue Book have included roles as a Blue Book copy editor, press vehicle wrangler, and VIN analyst. In her spare time, she can be found tinkering with her 1970 Chevrolet Camaro, trying out new recipes in her cast iron pans, and spoiling her two cats, Grayson and Thaddeus.

Frankie Rogers

Colin Ryan, Author at Kelley Blue Book

Scott Hinderer is an award-winning copy editor. Before joining Cox Automotive in 2022, he built a 15-year career in print and digital journalism. His diverse résumé brings a broad perspective and commitment to accuracy to Autotrader and Kelley Blue Book that enrich the reader experience. Scott has a Bachelor of Arts in English from Salisbury University.

Scott Hinderer

Russ Heaps has produced automotive content for newspapers, magazines, and websites since 1987. Knight-Ridder recognized his contributions in founding and supplying content for the stand-alone auto section in the Boca Raton News with a Knight-Ridder Excellence award nomination in 1990. He began contributing advice and other automotive-related content to Cox Automotive as a contractor in 2010. Cox Automotive brought Russ on board as Senior Editor, Advice for Kelley Blue Book in 2022. Previously, he contributed financial and automotive content for Bankrate.com. He was also managing editor for Auto World and NOPI Street Performance Compact magazines for four years. His work has appeared in the Washington Times, the Miami Herald, the Palm Beach Post, and a host of other newspapers on a syndicated basis. 
Russ also has a deep background in travel as the supervising producer for the syndicated television series Discover America where he also wrote scripts and field-produced episodes. Additionally, he authored travel stories for AAA of the Carolinas Magazine.
He graduated Wittenberg University with a degree in Political Science. His passions are friends, cars, bourbon, and the Pittsburgh Steelers.

Russ Heaps

Convertible

Convertible Articles - Kelley Blue Book

Sub Compact Car

Sub Compact Car Articles - Kelley Blue Book

2026MINI Convertible

2026MINI Convertible Archives - Kelley Blue Book

convertible

convertible Archives - Kelley Blue Book

$33,500 - $38,499

$33,500 - $38,499 Archives - Kelley Blue Book

$38,500 - $43,499

Used GMC Sierra 3500 for Sale in Fort Collins, CO

Location

Year

Make, Model & Trim

Condition (1 selected)

Drive Type

Price & Payments

Best Deals

Ways to Purchase

Mileage

Body Style

Truck Cab Size

Fuel Type

Truck Bed Length

Fuel Economy

Exterior Color

Interior Color

Transmission

Engine Displacement

Vehicle History

Cylinders

Features

Number of Seats

Number of Doors

Seller Type

43 Matches

2020 GMC Sierra 3500

2021 GMC Sierra 3500

2022 GMC Sierra 3500