The Chevrolet Express and GMC Savana are full-size vans from General Motors. Some model years have keyless entry remote key fobs that are onboard programmable, which means a person can program the keyless entry remote key fob with no special equipment other than the keyless entry remote key fob programming instructions. While other model years are not on-board programmable and require special equipment in order to program the keyless entry remote key fob.