Level Select Cheat
Enter LAZYPLAYER at the cheat menu.

Money Cheat
Enter LOTSAMONEY on the cheat menu.

Unlock All Cheats
Enter CHEATINGMUTHATRUCKER at the cheat menu.

Unlock Evil Truck
Clear the 60 Day Trial By Truckin' mode and win the race to Big Mutha Trucking HQ.

Cheat List
Enter the cheats below in on the Cheats screen of the Options menu to activate their effects:

Automatic Nav: USETHEFORCE
Diplomatic Immunity: VICTORS
Evil Truck: VARLEY
Fast Truck: GINGERBEER
Infinite Time: PUBLICTRANSPORT
Level Select: LAZYPLAYER
Small Pedestrians: DAISHI
Toggle Damage: 6WL
Tons of Cash: LOTSAMONEY
Unlock Everything: CHEATINGMUTHATRUCKER

Move Faster
If you want your truck to haul arse, in the options screen enter the code: GINGERBEER.

Squash 'em
To make pedestrians squishier, you can shrink them by entering the code: DAISHI.

More Time
If you want infinite time, enter the code: PUBLICTRANSPORT.

Jackers On Your Cargo
If a jacker jumps on your cargo, swerve and you will score big bucks and knock him off.

Bonus levels
Go to the options screen and select "Cheats". Press Y to enter a cheat code and enter JINGLEBELLS.