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# 020604001.
Affected Component: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE
SOME CUSTOMERS MAY COMMENT THAT THE ENGINE LACKS POWER FOLLOWING A WIDE OPEN THROTTLE DOWNSHIFT, EITHER 3-2 OR 4-2, FOLLOWED BY A WIDE OPEN THROTTLE 2-3 UPSHIFT. *TT