No Drive in Drive Range

WARNING: This page is about a different car, the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. 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