Cheat mode:
Press Q+ I + [F12] during game play while in a truck. Press ~ to display the console prompt in the lower left part of the screen. Enter one of the following codes then press [Enter] to activate the corresponding cheat function.

Effect	Code
Set tire size	settyrescale(<number>)
Repair truck	handyman()
No truck damage	ironman(1)
All modes unlocked	freeman()