Engine Cranks Slowly

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, and 2003 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

Perform the following checks:

Battery - See BATTERY TESTING & INSPECTION (NON-HP2) .
Wiring - Inspect the wiring for damage. Inspect all connections to the starter motor, solenoid, battery, and all ground connections. See INTERMITTENT OR POOR CONNECTIONS .
Engine - Make sure the engine is not seized. See GASOLINE ENGINE - MECHANICAL TROUBLE SHOOTING .

If the battery, the wiring and the engine are functioning properly and the engine continues to crank slowly, replace the starter motor. See STARTER MOTOR .