Engine Cranks Slowly

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Perform the following checks:

Battery Inspection/Test. Refer to Battery Inspection/Test .
Wiring-Inspect the wiring for damage. Inspect all connections to the starter motor, solenoid, battery, and all ground connections. Refer to CIRCUIT TESTING, WIRING REPAIRS , TESTING FOR INTERMITTENT AND POOR CONNECTIONS and CONNECTOR REPAIRS .
Engine-Make sure the engine is not seized. Refer to SYMPTOMS - ENGINE MECHANICAL .
If the battery, the wiring and the engine are functioning properly and the engine continues to crank slowly, replace the starter motor. Refer to STARTER MOTOR .