Symptom Chart

Symptom	Possible Cause	Action
The engine does not crank (starter motor does not turn)	Gear selector not in P or N position Battery Harness/Connectors Starter motor Starter relay Start switch Transmission control module (TCM) Engine control module (ECM) Engine seized	Make sure the gear selector is in the P or N position and correctly adjusted. Refer to Selector Lever Cable Adjustment article. Check the battery condition and state of charge. Refer to Battery article. Check the starter motor and harness. Check for DTCs and refer to DTC Index
The engine does not crank (starter motor does turn)	Starter motor installation Starter motor Ring gear	Check the starter motor installation (fasteners tight, starter motor square to engine, etc). Check the ring gear teeth for damage, foreign objects, etc.
Engine cranks too slowly	Battery Harness/Connectors Starter motor Engine oil incorrect grade	Check the battery condition and state of charge. Refer to Battery article. Refer to the appropriate system wiring diagrams article and test the starter motor and starter motor circuits
Engine cranks too fast	Low engine compression	Check the engine compressions. Refer to Engine article.
Excessive starter motor noise	Starter motor Starter motor installation/casing Ring gear	Check the starter motor installation (fasteners tight, motor square to engine, etc). Check the starter motor casing condition. Check the ring gear teeth for damage, foreign objects, etc.