Fuel Injection Pump Driven Sprocket Installation

Special Tools

• EN-956-1  Extension
• EN-6347  Holder

For equivalent regional tools, refer to Special Tools .

1. Install the fuel injection pump driven sprocket (2) in the correct position (1).
   Fig 1: Fuel Injection Pump Driven Sprocket

   Courtesy of GENERAL MOTORS COMPANY
2. Install the fuel injection pump driven sprocket nut (3).
3. Install the EN-6347  holder (1) with the EN-956-1  extension (2) to the fuel injection pump driven sprocket.
   Fig 2: Holder And Extension

   Courtesy of GENERAL MOTORS COMPANY
4. Tighten the fuel injection pump driven sprocket nut to 50 N.m (37 lb ft).
   CAUTION: Refer to Fastener Caution .
5. Remove the EN-6347  holder with the EN-956-1  extension from the fuel injection pump driven sprocket.