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# 776001.
Affected Component: ENGINE AND ENGINE COOLING:ENGINE
KNOCK, RATTLE OR TAP NOISE FROM THE ENGINE BEFORE THE ENGINE HAS REACHED OPERATING TEMPERATURE OR UNDER LIGHT LOAD CONDITIONS AT OPERATING TEMPERATURE
KNOCK, RATTLE OR TAP NOISE FROM THE ENGINE BEFORE THE ENGINE HAS
REACHED OPERATING TEMPERATURE OR UNDER LIGHT LOAD CONDITIONS AT
RATURE (REPLACE PISTON AND/OR ROD ASSEMBLIES). *TW