I just received one in the mail also.
Fortunately.... too late.
I had my 2005 C6 in the shop too many times for this exact problem.
Message comes on while driving and brakes begin to grab.
most of the time got it back, could not duplicate proble. However, some times they did replace wheels sensors, brake sensors, steering sensors, (twice), harnesses, etc.
I took it into 4 different dealers in my area.
They even worked with the "Engineering brain trust" in Detroit who had assigned a Case number to this issue.
They still could not figure it out.

Once it was out of warranty, and they kept guessing, it was costing me $300 to $400 replacing sensors every time I was in.

Finally after telling me they were 80% SURE the "G sensor" in the dash was bad, (and that did not fit it either), I traded it in and bought a 2009 ZO6.
I couldn't be happier!
That's my kind of recall!
