GM Service Manual Online
For 1990-2009 cars only

Problem

Action

The oil level indicator is loose.

  1. Tighten the cap.
  2. Replace the cap as necessary.

The oil level is too high.

Drain the oil in order to acquire the proper oil level. Refer to Transmission Fluid Check .

The oil level is too low.

Add oil in order to acquire the proper oil level. Refer to Transmission Fluid Check .

The modulator is faulty.

Replace the modulator. Refer to Transmission Modulator Replacement .

The oil level indicator tube is plugged.

  1. Check the fill tube for blockage.
  2. Clean the tube as necessary.

The breather is clogged.

Clean or replace the breather.

The transmission oil contains water.

  1. Drain the oil.
  2. Replace the oil. Refer to Transmission Fluid Check .

The oil level indicator gasket is worn.

Replace the gasket or the oil level indicator. Refer to Transmission Oil Level Indicator Tube Replacement

The oil level indicator is improperly marked.

Replace the oil level indicator. Refer to Transmission Oil Level Indicator Tube Replacement .