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# PIP-4608.
CHEVROLET: SES LIGHT, REDUCED POWER MODE, POOR PERFORMANCE DURING HIGH ACCELERATION ATTEMPT. CHECK THE FUEL TANK ASSEMBLY FOR "AN" MARKING ON THE FRONT SURFACE OF THE FUEL TANK (TRAVERSE ONLY). *PE