Google "2012 Chevrolet Volt / Opel Ampera Service Manual" (you'll find PDF if it has not been taken down)
Anyway, you need to provide mode details than number of issues per module. For example, the steering wheel has..
C0710 00 or C0710 11
• The steering wheel angle sensor fails internally.
• The steering wheel alignment may be out of the specified range.
• The steering wheel angle sensor may not be properly mounted.
The steering wheel angle sensor detects an error of 30° or more.
The steering wheel angle sensor signal does not vary.
The steering wheel angle sensor signal has a low amplitude signal.
The steering wheel angle sensor signal has a high amplitude signal or greater value than physically possible.
The steering wheel angle sensor is not calibrated or learned.
And same goes to pretty much every component.
So get the service manual.. There's error description, repair instructions and spare part & tool numbers for each step.
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