P0964, P0966, or P0967

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

No DTCs P2669, P2670, or P2671.
Battery voltage is greater than 9.0 V and less than 18 V.
Engine speed is greater than 200 RPM.
Engine crank time is not extended.