Cletus' Pickup Truck

The Pickup Truck is Cletus' vehicle. He always carries boxes with chickens on the back.

When Marge and Lisa needed a vehicle to get to the school, they jumped on the back of the truck, and later stole it.

Non-canon
In "The Simpsons: Hit & Run", one can unlock Cletus' pickup truck after completing the bonus mission in Level 1. It is also used in the mission "Better than Beef" in Level 2 and in the mission "Redneck Roundup" in Level 4.