If your truck has a cord it will be on the passenger side behind the fog light. Sounds like you dont have the cord but all trucks come with a block heater. You will have to buy a cord and plug it in to the block just above the starter. Then run it to the front of the truck.I just bought an 08 and can't find mine either. I crawled under the truck and looked up at the starter couldn't see the heater or a plug coming from it. Is it allways on the right side of the bumper?