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# 050898002.
LAMINATED STEELS - GENERAL INFORMATION AND SPECIFIC REPAIR PROCEDURES FOR HINGE PILLAR BODY REPLACEMENT-FRONT INNER, RAIL REPLACEMENT FRONT COMPARTMENT-FRONT AND WHEELHOUSE REPLACEMENT-FRONT. *TT