Here are the Cheat Codes for GTA 5 on PC Campaign.
Player Effects Use Phone or [ ~] key to open console.
List of all known cheats. Use the little ~ key to enter them
Change Weather – MAKEITRAIN
Slippery Cars Drifting – SNOWDAY
Explosive Melee Attack – HOTHANDS
Give Parachute – SKYDIVE
Moon Gravity – FLOATER
Drunk Mode – LIQUOR
Recharge Ability – POWERUP
Enter 3 times for full effect – SLOWMO
Skyfall Launches you into the sky – SKYFALL
Spawn BMX – BANDIT