Punisher truck:
Press C-Down at the vehicle selection screen.

4x4 Monster truck:
Press C-Up at the vehicle selection screen.

Thunderbolt truck:
Press C-Left at the vehicle selection screen.

The Crusher truck:
Press C-Right at the vehicle selection screen.

El Cajon track:
Hold Up and press the L + R at the track selection screen. An air wrench sound will confirm correct code entry. Highlight the El Paso track and press Z + A to start.

Flagstaff track:
Hold Left and press the L at the track selection screen. An air wrench sound will confirm correct code entry. Highlight the Mojave track and press Z + A to start.

Guadalupe track:
Hold Down and press R at the track selection screen. An air wrench sound will confirm correct code entry. Highlight the Vegas track and press Z + A to start.