They won't do much for the ole' pickup truck, but Buckle-Down can help outfit your dog with a branded collar.
Whether your allegiance lies with Ford or Chevy (there doesn't appear to be a Dodge collar yet), each Buckle-Down collar is fitted with a miniaturized, functional seatbelt buckle and the brand logo of your choosing. The leashes and collars are made from tough nylon. If the auto brands don't fit the bill, the collars can also be given various graphic designs and color schemes.
The collars retail from $20-30.