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# 300800.
Affected Component: AIR BAGS:FRONTAL:SENSOR/CONTROL MODULE
THIS MESSAGE CONCERNS THE POSSIBILITY OF CERTAIN VEHICLES HAVING A VERY RANDOM AND BRIEF ILLUMINATION OF THE AIRBAG LIGHT DURING VEHICLE OPERATION. *TT