Installation Procedure

Install the new flange gasket on the injection pump.

Fig 1: Injection Pump Hub Locating Stud

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Be sure the locating stud (1) on the injection pump hub goes into the slotted/elongated hole in the driven gear.

Adjust the locating stud (1) to the proper position to match with the slotted/elongated hole in the driven gear.

Fig 2: Driven Gear Slotted/Elongated Hole

Courtesy of GENERAL MOTORS CORP.

Install the injection pump making sure the locating stud is positioned within the slotted/elongated hole (1) in the driven gear.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Fig 3: Injection Pump Flange Nuts

Courtesy of GENERAL MOTORS CORP.

Install the injection pump flange nuts.
Tighten: Tighten nuts to 40 N.m (30 lb ft).

Fig 4: Driven Gear-To-Injection Pump Bolt

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: All the driven gear bolts should not be torqued until all the bolts are installed. This will allow for the proper alignment of all the bolt holes.

Install the driven gear bolts (1).
Tighten: Tighten the bolts to 25 N.m (18 lb ft).
Install the grommet for the oil filler tube.
Install the oil filler tube.
Install the fuel feed line at the injection pump.
Install the fuel return line to the top of the injection pump.
Install all necessary harnesses and connectors.
Install the injection lines. Refer to the tags on lines. Refer to Fuel Injection Line(s) Replacement .
Install the intake manifold. Refer to Intake Manifold Installation - Lower) and Intake Manifold Installation - Upper) in Engine Mechanical - 6.5L.
Install the negative battery cables.
Adjust the injection timing. Refer to Fuel Injection Pump Timing Adjustment .