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Home >> GMC >> 2022 >> Terrain SLE, 4WD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 9T45 (M3U) Or 9T50 (M3D M3H) - Diagnostic Information And Procedures (2 Of 2) >> Diagnostic Information and Procedures >> Fluid Leak Diagnosis >> Dye and Black Light Method

Dye and Black Light Method

A fluid dye and black light kit is available from various tool manufacturers.

  1. Follow the manufacturer's instructions in order to determine the amount of dye to use.
  2. Operate the vehicle for 24 km (15 mi) or until normal operating temperatures are reached.
  3. Detect the leak with the black light.
  4. Make the necessary repairs.
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