Used cars may cost less, but can also have reduced warranties - or no warranty at all - and might require immediate maintenance. If you would like peace of mind in a used car purchase, a GMC certified pre-owned car can give you that. The certified vehicles at Walker Motor Company LLC must complete an intensive multi-point evaluation by certified mechanics. Our CPO cars also come with warranties. The bottom line is, our CPO vehicles are in their own category. They are not used or new. They are like-new cars. You get the latest design, comfort, and superior quality at a better price.