GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

EGR Inlet Pipe


    Object Number: 297385  Size: SH
  1. Remove the EGR inlet pipe (1) flange mounting bolt (2) that attaches the pipe flange to the coolant crossover assembly (5).
  2. Remove the EGR inlet pipe nut that attaches the pipe flare to the rear exhaust manifold.

Installation Procedure

EGR Inlet Pipe


    Object Number: 297385  Size: SH
  1. Hand tighten EGR inlet pipe (1) flange mounting bolt (2) to the coolant crossover assembly (4).
  2. Attach the EGR inlet pipe nut (3) to the rear exhaust manifold (4).
  3. Tighten
    Tighten the EGR inlet pipe nut to 60N·m (44 lb ft).

    Tighten
    Tighten the EGR inlet pipe (1) flange mounting bolt (2) to 24N·m (18 lb ft).

Removal Procedure

EGR Outlet Pipe


    Object Number: 256277  Size: SH
  1. Remove the injector sight shield mounting nuts (2).
  2. Lift the injector sight shield off the mounting studs by lifting at the front (4) of the cover.

  3. Object Number: 256324  Size: SH
  4. Remove the EGR outlet pipe (3) upper flange mounting bolts (1) from the intake manifold.
  5. Remove the EGR outlet pipe (3) lower flange mounting bolt (2) from the coolant crossover assembly.
  6. Remove the EGR outlet pipe.

Installation Procedure

EGR Outlet Pipe


    Object Number: 256324  Size: SH
  1. Install the EGR outlet pipe (3) between the Intake manifold and the coolant crossover assembly.
  2. Install the EGR outlet pipe (3) lower flange mounting bolt (2) into the coolant crossover assembly.
  3. Tighten
    Tighten the mounting bolt to 24N·m (18 lb ft).

  4. Install the EGR outlet pipe (3) upper flange mounting bolts (1) into the intake manifold.
  5. Tighten
    Tighten the mounting bolts to 10N·m (88 lb in)


    Object Number: 256277  Size: SH
  6. Keeping the injector sight shield as level as possible, place the rear (1) of the shield under the mounting bracket (6).
  7. Align and press the injector sight shield (4) onto the mounting studs (5).
  8. Install the mounting nuts (2) onto the mounting studs (5).
  9. Tighten
    Tighten the mounting nuts (2) to 3N·m (27 lb. in.).