LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Pontiac >> 2004 >> GTO Standard >> Repair and Diagnosis >> Engine Mechanical >> Engine Exhaust System >> Repair Instructions >> Muffler Replacement >> Installation Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Installation Procedure

  1. Position the muffler assembly to the vehicle.
  2. Support the muffler assembly with a jackstand.
    3. Fig 1: Locating Rubber Hangers & Retaining Clips
    GM1343973Courtesy of GENERAL MOTORS CORP.
  3. Install four rubber hangers (2), to the right and left muffler support hangers and four retainer clips (1).
    4. Fig 2: View Of Muffler Flange Gasket
    GM1343069Courtesy of GENERAL MOTORS CORP.
  4. Install a new catalytic converter to muffler flange gasket (2).
  5. Install the catalytic converter to muffler flange bolts (1).
    NOTE: Refer to Fastener Notice in Cautions and Notices.

    Tighten:  Tighten the catalytic converter to muffler flange bolts to 45 N.m (33 lb ft).

    6. Fig 3: View Of Rear Muffler Pipes & Ring Clamp Fastening Nuts
    GM1343972Courtesy of GENERAL MOTORS CORP.
  6. Position the rear pipe assembly.
  7. Slide both of the rear pipes (2) into the muffler pipe slip joints.
  8. Install two ring clamp fastening nuts (1).

    Tighten:  Tighten the ring clamp nuts to 43 N.m (32 lb ft).

    9. Fig 4: View Of Rubber Hangers & Retainer Clips
    GM1343970Courtesy of GENERAL MOTORS CORP.
  9. Install two rubber hangers (2), to the support hangers and two support hanger retainer clips (1).
  10. Lower the vehicle.
scientia non olet · About LEMON Manuals