GM Service Manual Online
For 1990-2009 cars only

Front Pipe Replacement Gasoline Engines

Removal Procedure

    Caution: Refer to Exhaust Service Caution in the Preface section.


    Object Number: 1375494  Size: SH
  1. Remove the exhaust lower bracket bolts.
  2. Remove the exhaust lower bracket.
  3. Remove the exhaust front pipe nuts and the gasket.

  4. Object Number: 1537857  Size: SH
  5. Remove the nuts that attach the exhaust front pipe to the exhaust front muffler.
  6. Remove the gasket from the muffler.

  7. Object Number: 1375496  Size: SH
  8. Disconnect the exhaust front pipe from the rubber hanger.
  9. Remove the exhaust front pipe.
  10. Clean the sealing surfaces on the front muffler pipe flange and the exhaust front pipe.
  11. Inspect the exhaust front pipe for holes, damage, open seams, or other deterioration which could permit exhaust fumes to seep into the passenger compartment.

Installation Procedure


    Object Number: 1375496  Size: SH
  1. Install the exhaust front pipe and the gasket.
  2. Connect the exhaust front pipe to the rubber hanger.
  3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1537857  Size: SH
  4. Install the exhaust front muffler to the exhaust front pipe.
  5. Tighten
    Tighten the nuts to 30 N·m (22 lb ft).


    Object Number: 1375494  Size: SH
  6. Install the gasket and the exhaust front pipe nuts.
  7. Tighten
    Tighten the nuts to 40 N·m (30 lb ft).

  8. Install the exhaust lower bracket.
  9. Install the exhaust lower bracket bolts.
  10. Tighten
    Tighten the bracket bolts to 40 N·m (30 lb ft).

Front Pipe Replacement Diesel Engine

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1820485  Size: SH

    Caution: In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

    Notice: When inspecting or replacing exhaust system components, make sure there is adequate clearance from all points on the underbody to prevent overheating of the floor pan and possible damage to the passenger compartment insulation and trim materials.

  1. Disconnect the negative battery cable.
  2. Disconnect the exhaust gas temperature sensor 1 connector.

  3. Object Number: 1863818  Size: SH
  4. Remove the rubber hanger.
  5. Remove the exhaust front pipe with the gasket. If damaged, replace the new gasket.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1863818  Size: SH
  1. Install the exhaust front pipe.
  2. Tighten
    Tighten the exhaust front pipe nuts to 40 N·m (29.5 lb ft).

  3. Install the rubber hanger.

  4. Object Number: 1820485  Size: SH
  5. Connect the exhaust gas temperature sensor/connector.
  6. Connect the negative battery cables.