GTA Online Casino Heist Sewer Tunnel Locations

Master the Casino Heist in GTA Online 2026 with precise sewer tunnel locations. These underground paths offer stealthy access to the Diamond Casino vault, bypassing guards for big scores.

East Sewer Tunnel Entrance

Located under the highway overpass east of the casino. Enter via grate near the support pillar; leads directly to vault prep area.

  • GPS: Maze Bank Arena side
  • Stealth approach ideal
  • Vault door proximity

West Sewer Tunnel Access

Hidden behind dumpsters in the alley west of the casino parking. Follow pipes down; watch for cameras.

  • Alley off Vespucci Blvd
  • Quick ladder descent
  • Pairs with north gate

North Industrial Sewer Entry

From the construction site north, drop into manhole. Long tunnel but minimal patrols.

  • Industrial zone north
  • Extended swim section
  • Emerges near garage

South Drain Tunnel Shortcut

Under the bridge south of casino; grate requires drill. Fastest for aggressive playstyles.

  • Bridge support south
  • Drill tool needed
  • Direct to security room

Tips for Sewer Tunnel Routes

Disable alarms first; use suppressed weapons. Best for Silent & Sneaky approach in 2026 updates.

  • Bring thermal charges
  • 2-player optimal
  • Loot multipliers apply

Common Mistakes to Avoid

Don't trigger floods; map patrols. Update game for 2026 path tweaks.

  • Avoid peak guard times
  • Scout with drone
  • Backup route ready

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