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# GCUS-3-412.
15671A - SERVICE UPDATE (REVISED SERVICE PROCEDURE). REPOSITION THE MAIN BODY WIRING HARNESS BRANCH LOCATED IN THE ENGINE COMPARTMENT ON CERTAIN VEHICLES EQUIPPED WITH 3.6L DOHC V6 ENGINE (RPO LFX). IF THE HARNESS IS NOT ROUTED PROPERLY, THE ENGINE MAY NOT START, HAVE REDUCED POWER, SHUT OFF OR STALL WHILE DRIVING. THIS CONDITION COULD HAVE OTHER EFFECTS, INCLUDING THE CENTER HIGH MOUNT STOP LAMP (CHMSL), TURN SIGNAL LIGHTS OR HEADLIGHTS BECOMING INOPERATIVE.
