This bulletin applies to 2011-2012 Buick Regal and 2010-2012 LaCrosse vehicles equipped with variable assist power steering.
The steering wheel may be hard to turn at slow speeds. A possible cause is the variable power steering solenoid valve connector may be connected backwards/reversed at the rack and pinion connector in the frame.
Using scan tool GDS2, navigate to the power steering control module > output controls. Then command voltage up on the valve, and see if the power steering gets easier to turn. If so, the solenoid connector is likely reversed.
Raise the vehicle and examine the in-line connector on the frame at the rack.
Reference the attached photos. Photo 1 shows the correct connector orientation. Photo 2 shows the connector reversed.