I had the same problem on my '10 CC LS. Dropped into the dealer to have them look at it on a saturday morning. It is a known issue and they replaced it on the spot under my warranty, had them in stock and it only took 15 minutes.
This is an older thread, you may not receive a response, and could
be reviving an old thread. Please consider creating a new thread.
GM Truck Club Forum
A forum community dedicated to all General Motors truck owners and enthusiasts. Come join the discussion about performance, lift kits, wheels, tires, modifications, troubleshooting, maintenance, and more!