GM Service Manual Online
For 1990-2009 cars only
  1. Start the engine.
  2. Shift the transmission through all the ranges in order to fill the clutch cavities and oil passages.
  3. Shift the transmission to neutral.
  4. Idle the engine for at least 1 minute at 1,000-1,200 RPM in order to clear the system of air.
  5. Make sure the parking brake is applied.
  6. Notice: When adding oil or checking the oil level, dirt or foreign material must not be allowed to enter the fill tube. Before removing the oil level indicator, clean around the end of the fill tube. Contaminated transmission oil will cause rapid wear and early failure of internal parts.

  7. Check the oil while the vehicle is on level ground.

Cold Oil Check

  1. Idle the engine.
  2. Make sure the oil temperature is at 16-49°C (60-120°F).
  3. Remove the oil level indicator from the oil filler tube.

  4. Object Number: 201483  Size: SH
  5. Check the oil level.
  6. • If the oil level registers between the COLD ADD (4) and the COLD FULL (3) bands, the transmission may be safely operated.

       Important: Do not overfill the transmission with oil. Refer to Transmission Fluid Check .

    • If the level registers at or below the COLD ADD (4) band, add oil in order to bring the oil level to the COLD FULL (3) band. Refer to Adjusting The Oil Level.
  7. Make a hot oil check after the transmission reaches the operating temperature.

Hot Oil Check

  1. Idle the engine.
  2. Make sure the oil sump temperature is at 38-49°C (100-120°F).
  3. Remove the oil level indicator from the oil filler tube.

  4. Object Number: 201483  Size: SH
  5. Check the oil level.
  6. • If the oil level registers between the HOT ADD (1) and the HOT FULL (2) bands, the transmission may be safely operated.

       Important: Do not overfill the transmission with oil. Refer to Fluid Capacity Specifications .

    • If the level registers at or below the HOT ADD (1) band, add oil in order to bring the oil level to the HOT FULL (2) band. Refer to Adjusting The Oil Level.