GTA V Cheats

Personal Invincibility (Not for vehicles)

While playing, (quickly) press Right, X, Right, Left, Right, R1, Right, Left, X, Triangle for five minutes of invincibility. You can also dial "Painkiller", which is numerically spelled "1-999-724-6545537" on your cell phone. After five minutes you have to re-enter the code. 

Full Weapons & Armor

While playing, (quickly) press Circle, L1, Triangle, R2, X, Square, Circle, Right, Square, L1(3). You can also just call "1-999-887-853" (TURTLE) on your cell phone.