While there are no traditional "button code" cheats for unlimited money in Gran Turismo 5 on PS3, players can use high-payout race grinds and save file editors to accumulate millions of credits quickly.
For players who want an immediate influx of cash without grinding, a third-party PC tool is required. Gran Turismo 5 Cheats Ps3 Money Cheat
Grinding specific races is the most reliable way to earn money, especially since official seasonal events (which offered massive bonuses) have been discontinued. Requirements : Reach Level 23. While there are no traditional "button code" cheats
Once you reach higher levels, you can enter B-Spec endurance races (like the 4-hour Nurburgring) and let the AI driver race while you are away to earn millions of XP and credits. Requirements : Reach Level 23
: Earn approximately 36,000 Credits every 5 minutes (including loading). Endurance Races (B-Spec)