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# 091000.
SOME VEHICLES MAY EXHIBIT WATER ENTRY INTO THE MAIN JUNCTION BOX CAUSING INTERNAL CORROSION AND POSSIBLY A CROSSOVER SITUATION TO POWER OTHER CIRCUITS. *TT