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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 261 (Engine Exhaust System) >> Repair Instructions >> Muffler Replacement (LFA With Norma Flange) >> Removal Procedure

Removal Procedure

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    Fig 1: View Of Chassis Wiring Harness Electrical Connectors & Right Rear Wheel Speed Sensor Wiring Harness Electrical Connector
    GM1709051Courtesy of GENERAL MOTORS CORP.
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Disconnect the chassis wiring harness electrical connector (1) from the right rear wheel speed sensor wiring harness electrical connector (2).
  3. Remove the right rear wheel speed sensor wiring harness electrical connector clip from the frame.
    4. Fig 2: View Of Right Axle Tie Rod Bolt & Nut
    GM1709061Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The rear axle wiring harness clip is a one way clip with a D-shape section. The clip can only be installed and/or removed in only one direction.
  4. Remove the right rear wheel speed sensor wiring harness clips from the frame and the control arm bracket.
  5. Position a suitable adjustable jack under the rear axle.
  6. Remove the right axle tie rod bolt (2) and nut (1).
    7. Fig 3: Rear Axle Vent Hose (8.6 or 9.5 Inch Ring Gear)
    GM692548Courtesy of GENERAL MOTORS CORP.
  7. Remove the rear axle vent hose from the rear axle, if necessary.
  8. Remove the right rear stabilizer shaft link to frame bolt and nut.
  9. Remove the right rear stabilizer shaft link from the frame.
  10. Remove the right rear shock absorber lower bolt and nut.
  11. Lower the right side of the rear axle using the adjustable jack to gain clearance for removal of the muffler pipe.
    12. Fig 4: Band Clamp & Bolt
    GM1972642Courtesy of GENERAL MOTORS CORP.
  12. Remove the catalytic converter to muffler clamp bolt (1).
    13. Fig 5: View Of Exhaust System Hangers
    GM1709380Courtesy of GENERAL MOTORS CORP.
  13. Lubricate the insulators where the muffler pipe hangers are inserted in order to ease in removal.
  14. Remove the insulators from the exhaust system hangers (1, 2, and 3).
    15. Fig 6: Insulators
    GM1974260Courtesy of GENERAL MOTORS CORP.
  15. Remove the insulators (1) from the exhaust system hangers near the muffler, leaving them on the vehicle.
  16. With the aid of an assistant, remove the muffler pipe assembly from the vehicle.
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