Cheat Codes
Cheat codes can be entered by using the D-pad (not the analog stick) on the controller, the buttons and the triggers. You can use the codes to do everything from committing suicide to changing the weather. You will know that you've been successful when you see "cheat code activated" at the top of your screen. Some of the more useful cheat codes are:
Faster Cars: Right, R Trigger, Up, White, White, Left, R Trigger, L Trigger, R Trigger, R Trigger
Maximum Stamina: Up, A, Y, A, Y, A, X, Black, Right
Maximum Respect: L Trigger, R Trigger, Y, DOWN, Black, A, L Trigger, UP, White, White, L Trigger, L Trigger
Infinite Ammo: L Trigger, R Trigger, X, R Trigger, LEFT, Black, R Trigger, LEFT, X, DOWN, L Trigger, L Trigger
All traffic lights stay green: Right, R Trigger, Up, White, White, Left, R Trigger, L Trigger, R Trigger, R Trigger
Infinite air (when swimming underwater): Down, Left, L Trigger, Down, Down, Black, Down, White, Down
Perfect handling in vehicles: Y, R Trigger, R Trigger, Left, R Trigger, L Trigger, Black, L Trigger
Removes pedestrians and police: White, Up, R Trigger, R Trigger, Left, R Trigger, R Trigger, Black, Right, Down
No hunger: X, White, R Trigger, Y, UP, X, White, UP, A
Maximum sex appeal: B, Y, Y, UP, B, R Trigger, White, UP, Y, L Trigger, L Trigger, L Trigger
Lower your wanted level: R Trigger, R Trigger, B, Black, Up, Down, Up, Down, Up, Down
Infinite health: Down, A, Right, Left, Right, R Trigger, Right, Down, Up, Y
Drive your cars on water: Right, Black, B, R Trigger, White, X, R Trigger, Black
Glitches
There is one documented glitch in GTA SA. If you go to any safehouse that is a city that is not Los Santos, you can enter the wardrobe room and kill CJ (your character). You will end up at the Los Santos Hospital.