How much is the Chevrolet Monte Carlo SS 2dr Coupe worth? Enter the mileage, engine, transmission, optional features and condition for estimated trade. The LS engine remained a liter, horsepower V6, while the SS stayed at a liter, horsepower V6. Fuel economy remained nearly identical at 21/ Select a Chevrolet Monte Carlo SS Trim. Select a vehicle trim below to get a valuation. 2 Door Coupe. Popular Cars for Sale.