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# PIC-5211.
Affected Component: FUEL SYSTEM, OTHER:STORAGE:FUEL GAUGE SYSTEM
CHEVROLET: FUEL GAUGE READS EMPTY DTC P2068. THE FUEL GAUGE READS EMPTY AND THE SES LIGHT IS ON WITH A DTC P2068 STORED CURRENT. THIS MAY BE DUE TO A DISCONNECTED FUEL LEVEL SENSOR. *PE
