Speck Chevrolet of Prosser is a new Chevy and used car dealer in Prosser. You can expect only the highest level of customer service at Speck. We sell new Chevrolet Silverado trucks, as well as new Chevy Equinox, Tahoe, Traverse, Trailblazer, Colorado, Suburban, and Bolt models. We have over 300 new and used cars for sale at low prices. Our finance ...