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# 990603007B.
SOME CUSTOMERS MAY COMMENT ON THE FOLLOWING CONDITIONS:
1) THE FUEL GAUGE READING INCORRECTLY.
2) LOW FUEL CHIME SOUNDS PREMATURELY.
3) FUEL GAUGE MAY FLUCTUATE FROM FULL TO EMPTY. *TT