GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Acadia - AWD 🢒 General Information 🢒 General Information 🢒 Exhaust Flexible Pipe Replacement

Removal Procedure
  1. Remove the frame brace. Refer to Frame Brace Replacement .
  2. Remove the heated oxygen sensors (HO2S). Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 and Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 .

    3. Object Number: 2004220 Size: SH
  3. If equipped, remove the catalytic converter hanger clamp nut (1).

    4. Object Number: 1861344 Size: SH
  4. Remove the exhaust flexible pipe to muffler nuts (1).
  5. Pull back and separate the muffler pipe from the exhaust flexible pipe studs.

    6. Object Number: 1861324 Size: SH
  6. Remove the catalytic converter to exhaust flexible pipe nuts (1, 2).
  7. Remove the exhaust flexible pipe insulator from the underbody hanger.

    8. Object Number: 1861345 Size: SH
  8. Separate the exhaust flexible pipe from the catalytic converters.
  9. Remove and discard the catalytic converter gaskets (1).

Installation Procedure

    Object Number: 1861345 Size: SH
  1. Install NEW catalytic converter gaskets (1) onto the catalytic converter studs.
  2. Install the exhaust flexible pipe to the catalytic converters.

    3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1861324 Size: SH
  3. Install the catalytic converter to exhaust flexible pipe nuts (1, 2).

    4. Tighten
    Tighten the nuts to 28 N·m (21 lb ft).

  4. Install the flexible pipe insulator to the underbody hanger.

    5. Object Number: 1861344 Size: SH
  5. Pull back the muffler pipe and install the pipe to the exhaust flexible pipe studs.
  6. Install the exhaust flexible pipe to muffler nuts (1).

    7. Tighten
    Tighten the nuts to 50 N·m (37 lb ft).


    Object Number: 2004220 Size: SH
  7. If equipped, install the catalytic converter hanger clamp nut (1).

    8. Tighten
    Tighten the nut to 18 N·m (13 lb ft).

  8. Install the HO2S. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 and Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 .
  9. Install the frame brace. Refer to Frame Brace Replacement .