Basic:

+To locate the cars, you have to find them on the game map; three vans will appear available to hack throughout San Andreas.

+The days of the week are key, and on each day 3 vans will appear scattered across the map.

+The icon that will appear on the map is the same as the one for the trucker missions; you have to look for them, go there, 
and find the armored truck.

+These three trucks will test you with three difficulty levels: EASY, NORMAL, and HARD. Depending on which one you get, 
you'll be attacked by more or fewer guards, and hacking will be slower depending on the difficulty.