1,755 New GMC Sierra for Sale Near Casper, WY

There are 1,755 new GMC Sierra listings for sale from 36 dealerships, priced from $40,195 to $139,799.

The median asking price for a new GMC Sierra is $70,778. Listings range from $40,195 to $139,799. The average mileage is 131 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 2025 to 2026. The 2025–2029 model years are the most available, with 1,755 listings.

The GMC Sierra is available in the following trim levels:

• GMC Sierra Elevation 4WD Crew Cab Standard Box for sale214 listings
• GMC Sierra Pro 4WD Crew Cab Standard Box for sale171 listings
• GMC Sierra Denali 4WD Crew Cab Short Box for sale142 listings
• GMC Sierra SLT 4WD Crew Cab Short Box for sale138 listings
• GMC Sierra AT4 4WD Crew Cab Standard Box for sale132 listings
• GMC Sierra Denali 4WD Crew Cab Standard Box for sale116 listings
• GMC Sierra AT4 4WD Crew Cab Short Box for sale104 listings
• GMC Sierra Pro 4WD Crew Cab Long Box for sale68 listings
• GMC Sierra Denali Ultimate 4WD Crew Cab Standard Box for sale59 listings
• GMC Sierra AT4X 4WD Crew Cab Standard Box for sale58 listings