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Hello all I have a 2011 ZR1 with a Service Vehicle Soon upon start up and stiffer steering. The code is C0450. Have read a few threads on this issue but those drivers had sloppy steering while mine is stiffer. I checked the plug and it's connected and pins look good. My steering wheel needs aligned, could this be my issue? I dont know if the steering angle sensor and ebcm communicate?
Also I've noticed when I turn the car off I can feel the brake pedal rise up, EBCM bad?
Get a tech 2 on the car, and get the steering wheel sensor to 0 voltage, and then adjust the rack arms to get the tires straight forward on the alignment.
From here, check the wiring from the rack to the EBCM, to make sure its not corrosion/loose pin to connector/broken wire problem.
Once the above has been weeded out, then could be either rack, or EBCM that need to be repaired if you still have problems.