No Drive in Drive Range

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

Checks	Causes
Oil Pump (4)	Damaged vanes Missing slide spring Oil pump screen assembly plugged or damaged Oil pump rotor guide omitted or misassembled Oil pump rotor cracked or broken Porosity in fluid pump Oil pump surfaces not flat Excessive oil pump rotor clearance
Forward Sprag Clutch Assembly (642)	Damaged sprag Worn or pitted inner race
Input (662) and Reaction (681) Carrier	Damaged or worn gears