GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the oxygen sensors. Refer to the following procedures:
  2. •  Heated Oxygen Sensor 1 Replacement
    •  Heated Oxygen Sensor 2 Replacement
  3. Raise the vehicle. Support the vehicle. Refer to Lifting and Jacking the Vehicle.

  4. Object Number: 875991  Size: SH
  5. Remove the floor panel brace.

  6. Object Number: 836332  Size: SH
  7. Remove the following components from the exhaust manifold:
  8. • The 2 bolts
    • The 2 springs
  9. Remove the following components from the front pipe to the three way catalytic converter (TWC) exhaust pipe:
  10. • The 2 bolts
    • The 2 springs
  11. Remove the front pipe from the front pipe hanger (2).
  12. Remove the front pipe from the vehicle.
  13. Clean the gasket and seal the mating surfaces.

Installation Procedure


    Object Number: 836332  Size: SH
  1. Install the front pipe to the vehicle.
  2. Install the front pipe to the front pipe hanger (2).
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the following components to the front pipe to the TWC exhaust pipe:
  5. • The 2 springs
    • The 2 bolts

    Tighten
    Tighten the front pipe-to-TWC exhaust pipe bolts to 43 N·m (32 lb ft).

  6. Install the following components to the exhaust manifold:
  7. • The 2 springs
    • The 2 bolts

    Tighten
    Tighten the front pipe-to-exhaust manifold bolts to 43 N·m (32 lb ft).


    Object Number: 875991  Size: SH
  8. Install the floor panel brace.
  9. Tighten
    Tighten the front pipe floor brace nuts to 30 N·m (22 lb ft).

  10. Install the oxygen sensors. Refer to the following procedures:
  11. •  Heated Oxygen Sensor 1 Replacement
    •  Heated Oxygen Sensor 2 Replacement
  12. Lower the vehicle.