1,284 Used GMC Sierra for Sale Near Highlands Ranch, CO

There are 1,284 used GMC Sierra listings for sale from 374 dealerships, priced from $4,698 to $104,900.

The median asking price for a used GMC Sierra is $41,992. Listings range from $4,698 to $104,900. The average mileage is 76,652 miles.

The lowest-priced listing is a 1988 GMC Sierra Base 1500 at $4,698 with 137,374 miles in Fort Collins, CO.

Used GMC Sierra inventory spans model years 1988 to 2026. The 2021–2025 model years are the most available, with 748 listings.

The GMC Sierra is available in the following trim levels:

• GMC Sierra SLT 4WD Crew Cab Short Box for sale153 listings
• GMC Sierra Denali 4WD Crew Cab Standard Box for sale108 listings
• GMC Sierra Denali 4WD Crew Cab Short Box for sale106 listings
• GMC Sierra AT4 4WD Crew Cab Short Box for sale98 listings
• GMC Sierra AT4 4WD Crew Cab Standard Box for sale74 listings
• GMC Sierra Elevation 4WD Crew Cab Standard Box for sale71 listings
• GMC Sierra 4WD Crew Cab Short Box for sale58 listings
• GMC Sierra SLT 4WD Crew Cab Standard Box for sale57 listings
• GMC Sierra SLE 4WD Crew Cab Short Box for sale37 listings
• GMC Sierra SLT 4WD Crew Cab SWB for sale36 listings