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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1738 (Automatic Transmission - ALLISON - Symptom Troubleshooting And Diagnosis) >> Fluid Leaks from Fluid Fill Tube and/or Vent

Fluid Leaks from Fluid Fill Tube and/or Vent

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Condition Action
Dipstick loose Tighten the cap. Replace the cap if necessary.
Fluid level too high Drain the fluid to the proper level. Refer to Transmission Fluid Level and Condition Check .
Fluid level too low Add fluid to the proper level. Refer to Transmission Fluid Level and Condition Check .
Breather stopped up - clogged Clean or replace the breather.
Dipstick or fill tube seal worn Replace the seals or dipstick.
Incorrect dipstick marking Calibrate the dipstick.
Fluid contaminated with engine coolant or water Drain and replace fluid. Locate and fix source of additional fluid. Refer to Transmission Fluid Level and Condition Check  andAutomatic Transmission Fluid and Filter Replacement .