GM Service Manual Online
For 1990-2009 cars only

Condition

Action

DEFINITION: Vibration in all shift lever positions

    â€¢ Drive/flex plate inoperative or the transmission is improperly assembled
    â€¢ Base engine concern
    â€¢ 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 .
    â€¢ Inspect the stall speed.
    â€¢ Inspect the engine for proper operation. Use a scan tool to display any stored DTCs.