1,802 New GMC Sierra for Sale Near Longmont, CO

There are 1,802 new GMC Sierra listings for sale from 44 dealerships, priced from $40,195 to $139,799.

The median asking price for a new GMC Sierra is $71,379. Listings range from $40,195 to $139,799. The average mileage is 100 miles.

The lowest-priced listing is a 2026 GMC Sierra Pro 4WD Regular Cab Standard Box at $40,195 in Casper, WY.

New GMC Sierra inventory spans model years 2024 to 2026. The 2024–2028 model years are the most available, with 1,802 listings.

The GMC Sierra is available in the following trim levels:

• GMC Sierra Elevation 4WD Crew Cab Standard Box for sale236 listings
• GMC Sierra Pro 4WD Crew Cab Standard Box for sale166 listings
• GMC Sierra AT4 4WD Crew Cab Standard Box for sale155 listings
• GMC Sierra Denali 4WD Crew Cab Short Box for sale154 listings
• GMC Sierra Denali 4WD Crew Cab Standard Box for sale124 listings
• GMC Sierra SLT 4WD Crew Cab Short Box for sale115 listings
• GMC Sierra AT4 4WD Crew Cab Short Box for sale96 listings
• GMC Sierra Denali Ultimate 4WD Crew Cab Standard Box for sale73 listings
• GMC Sierra Pro 4WD Crew Cab Long Box for sale70 listings
• GMC Sierra AT4X 4WD Crew Cab Standard Box for sale64 listings