GM Service Manual Online
For 1990-2009 cars only

Condition

Action

DEFINITION: Vibration in all shift lever positions

    • Drive/flex plate inoperative or the transmission is improperly assembled
    • Base engine concern
    • Set the base idle RPM in gear, to the specified idle speed. If the conditions persist, adjust the engine and the transmission mounts. Refer to Engine Mount Replacement - Right Side , Transmission Front Mount Replacement , and Transmission Mount Inspection .
    • Inspect the stall speed.
    • Inspect the engine for proper operation. Use a scan tool to display any stored DTCs.