PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND REPLACING THE VVA OIL SUPPLY LINES ON CERTAIN C15 TRUCK ENGINES Usage: Caterpillar: Confidential Yellow PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND REPLACING THE VVA OIL SUPPLY LINES ON CERTAIN C15 TRUCK ENGINES SEBE9536-02 April 1, 2006 (Revised August 2009) U-97 A-76 TT-4 Show/hide table SERVICE LETTER CANCELLATION The April 1, 2006 (Revised May 2006) Service Letter, PI10439, "PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND REPLACING THE VVA OIL SUPPLY LINES ON CERTAIN C15 TRUCK ENGINES" has been cancelled.