GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Catera 🢒 Engine 🢒 Engine Exhaust 🢒 Resonator Replacement

Removal Procedure

    Important: The aid of a helper is necessary for the removal and for the installation of the rear exhaust section.

  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

    2. Object Number: 231131 Size: SH
  2. Remove the exhaust muffler front flange bolts.

    3. Object Number: 231156 Size: SH
  3. Remove the exhaust pipe hanger insulator retainers (1) from the exhaust system support rods (2) at the front and the rear of the resonator and the mufflers.

    4. Object Number: 231159 Size: SH
  4. Remove the hanger insulators from the front and the rear of the resonator (1).
  5. Remove the exhaust pipe hanger insulators from the front and the sides of the mufflers (1).

    6. Object Number: 231151 Size: SH
  6. Remove the rear exhaust section with the aid of a helper.

    7. Object Number: 231153 Size: SH
  7. Remove the exhaust resonator clamps (2) from the exhaust resonator (1).
  8. Separate the exhaust resonator from the exhaust muffler pipes.

Installation Procedure
  1. Install the exhaust resonator onto the exhaust muffler pipes.

    2. Object Number: 231153 Size: SH

    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 exhaust resonator clamps (2) onto the exhaust resonator (1).

    3. Tighten
    Tighten the exhaust resonator clamp nuts (2) to 25 N·m (18 lb ft).

  3. Install the rear exhaust section into place with the aid of a helper.

    4. Object Number: 231151 Size: SH
  4. Install the exhaust pipe hanger insulators to the front and the sides of the mufflers (1).

    5. Object Number: 231159 Size: SH
  5. Install the exhaust pipe hanger insulators to the front and the rear of the resonator (1).
  6. Install the hanger insulator retainers to the support rods at the front and the sides of the resonator and the mufflers.

    7. Object Number: 231131 Size: SH
  7. Install the exhaust muffler front flange bolts.

    8. Tighten
    Tighten the exhaust muffler front flange bolts to 40 N·m (30 lb ft).

  8. Check clearances and operate the exhaust system to check for leaks.
  9. Lower the vehicle.