GM Service Manual Online
For 1990-2009 cars only

Probable Cause

Action

DEFINITION: Gear disengagement occurs during normal operation.

The transmission shift control closeout boot is not positioned correctly.

  1. Inspect the transmission shift control closeout boot positioning.
  2. Reposition or replace the closeout boot, if necessary.
  3. Refer to Shift Control Shift Closeout Boot Replacement .

The transmission shift control is loose or damaged.

  1. Remove the transmission shift control.
  2. Inspect the shift control and replace if necessary.
  3. Refer to Shift Control Assembly Replacement .

The engine and/or the transmission mount are loose or damaged.

  1. Inspect the engine mounts.
  2. Tighten to specifications or replace as necessary.
  3. Refer to Engine Mount Replacement in Engine Mechanical - 5.7L.

  4. Inspect the transmission mount.
  5. Tighten to specifications or replace as necessary.
  6. Refer to Transmission Support and Mount Assembly Replacement .