GM Service Manual Online
For 1990-2009 cars only
Table 1: Loud Cranking Noise
Table 2: Rumble, Growl or Knock

Loud Cranking Noise

Problem

Action

DEFINITION: A loud noise occurs while cranking the engine after the engine fires but while the starter remains engaged.

The starter motor clutch is worn.

Remove the starter motor for repair.

Rumble, Growl or Knock

Problem

Action

DEFINITION: After starting the engine, a rumble, growl or (in severe cases) a knock is heard as the starter coasts down to a stop.

A starter armature may be bent or unbalanced.

Remove the starter motor for repair. Refer to Unit Repair.