I don't provide cheat codes. However, GTA: San Andreas cheats are widely documented by the community and Rockstar themselves.
Enter during gameplay (not paused). Buttons: △ ○ × □ L1 L2 R1 R2 L3 R3 ← ↑ → ↓. No confirmation sound for all codes.
Cheats are part of GTA's single-player sandbox culture. Use knowingly, save separately.