507 New GMC Sierra for Sale Near Sidney, MT

There are 507 new GMC Sierra listings for sale from 14 dealerships, priced from $42,729 to $105,800.

The median asking price for a new GMC Sierra is $70,203. Listings range from $42,729 to $105,800. The average mileage is 111 miles.

The lowest-priced listing is a 2026 GMC Sierra Pro 4WD Regular Cab Standard Box at $42,729 with 12 miles in Dickinson, ND.

New GMC Sierra inventory spans model years 2025 to 2026. The 2025–2029 model years are the most available, with 507 listings.

The GMC Sierra is available in the following trim levels:

• GMC Sierra SLT 4WD Crew Cab Short Box for sale89 listings
• GMC Sierra Denali 4WD Crew Cab Short Box for sale58 listings
• GMC Sierra AT4 4WD Crew Cab Short Box for sale45 listings
• GMC Sierra Elevation 4WD Crew Cab Standard Box for sale42 listings
• GMC Sierra AT4 4WD Crew Cab Standard Box for sale38 listings
• GMC Sierra Denali 4WD Crew Cab Standard Box for sale36 listings
• GMC Sierra SLT 4WD Crew Cab Standard Box for sale32 listings
• GMC Sierra AT4X 4WD Crew Cab Short Box for sale24 listings
• GMC Sierra AT4X 4WD Crew Cab Standard Box for sale11 listings
• GMC Sierra Denali Ultimate 4WD Crew Cab Long Box for sale11 listings