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# 03312004.
CORRECTION TO A DEALER VME SENT OUT ON MARCH 23, 2004 WITH REGARD TO CUSTOMERS COMMENTS THAT THEY FEEL THEIR SUSPENSION RIDE IS TOO STIFF, TOO SOFT, TOO SHAKY OR INCONSISTENT. *TT