I don't see in factory service information where it has to. The only thing I can think of, is centering of the steering position sensor. I would only suspect that to be an issue if the angles are off significantly. Here is the procedure, and when to perform.
Steering Angle Sensor Centering
The steering angle sensor does not require centering often. Centering of the steering angle sensor might be required after certain service procedures are performed. Some of these procedures are as follows:
Any change to the front wheel alignment
Collision or other physical damage
Electronic brake control module (EBCM) replacement
Intermediate shaft replacement
Steering angle sensor replacement
Steering column replacement
Steering gear replacement
Outer tie rod replacement
The EBCM, Steering Position Sensor Calibration procedure can be completed with a scan tool using the steps below.
Using the steering wheel, align the front wheels in the center forward position.
Apply the parking brake, or set the transmission in the PARK position.
Turn the ignition switch ON, with the engine OFF.
Clear any DTCs that may be set.
Using a scan tool, perform the EBCM, Special Functions, Steering Pos. Sensor Calibration.
Follow the scan tool directions to complete the calibration procedure.
After procedure is complete, press Exit and cycle the ignition OFF, open the driver door to cancel the Retained Accessory Power and wait one minute.
Cycle the ignition ON and clear all DTCs.
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Tuesday, December 27th, 2011 AT 11:54 PM