Joy Ride Turbo

There are 3 types of cars: Sport, Muscle and Truck.

When playing the Championship mode the 2nd championship requires you to choose a car from the Truck categorie. After playing the championship, which consists of 3 races, you will unlock this achievement.

Note: to unlock the 2nd championship you need to finish the 1st (I don't know if you need to win it)

Go onto Championship mode and choose the 2ns championship (Truck) and play it. Win all 3 races in the tournament and there's the achievement.

Hope I Helped and happy hunting - T0X1C