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# 051603.
THIS MESSAGE IS TO ADVISE ALL CHEVROLET, BUICK, PONTIAC AND OLDSMOBILE DEALERS OF TEMPORARY HOLD ON REMANUFACTURED ALL-WHEEL DRIVE TRANSMISSIONS. THE CONDITION IS EXTENSION HOUSING SHIM CALCULATION EQUAL 0. THE CAUSE IS AN INCORRECT PARK GEAR INSTALLED. *TT