Sorry, the NHTSA has not posted this TSB document yet.
You can still get the detailed info from Chevrolet for this TSB. Call your local Chevrolet dealer's service department & ask for a copy of TSB# PIE-0070B.
CHEVROLET: ENGINEERING INFORMATION-ELECTRONIC STABILITY CONTROL (ESC) MESSAGE DISPLAYED IN DRIVER INFORMATION CENTER (DIC), DTC C046 SET. ENGINEERING ATTEMPTING TO DETERMINE ROOT CAUSE OF THE ESC MESSAGE. *PE UPDATED 6/6/11. *PE