GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 Seville 🢒 General Information 🢒 General Information 🢒 Exhaust System Replacement

Removal Procedure

    Object Number: 105359 Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove four nuts from the catalytic converter to the exhaust downpipe.

    3. Object Number: 104986 Size: SH
  3. Remove the oxygen sensor heat shield and disconnect the oxygen sensor.

    4. Object Number: 284269 Size: SH
  4. Remove the two nuts and bolts securing the center exhaust hanger to the body.

    5. Object Number: 284270 Size: SH
  5. Remove the rear exhaust hanger attachment.
  6. Remove the exhaust system.

Installation Procedure

    Object Number: 284270 Size: SH
  1. Install the exhaust system.

    2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Install the rear exhaust to the exhaust hanger.

    3. Tighten
    Tighten the nuts to 27 N·m (20 lb ft).


    Object Number: 284269 Size: SH
  3. Install the center exhaust hanger to the exhaust.

    4. Tighten
    Tighten the nuts to 27 N·m (20 lb ft).


    Object Number: 104986 Size: SH
  4. Connect the oxygen sensor connector and install the oxygen sensor heat shield.

    5. Object Number: 105359 Size: SH
  5. Install the four nuts to the exhaust downpipe to the catalytic converter.

    6. Tighten
    Tighten the nuts to 24 N·m (18 lb ft).

  6. Lower the vehicle.