GM Service Manual Online
For 1990-2009 cars only
  1. Place the transaxle in the NEUTRAL position.
  2. Place the clutch in the DISENGAGED position.
  3. Run the engine at a normal idle.
  4. Engage the clutch.
  5. Wait approximately 9 seconds, then shift the transaxle into the REVERSE position.
  6. Inspect the clutch for disengagement if a grinding noise is heard.