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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 151 (Engine Exhaust System) >> Repair Instructions >> Muffler Replacement (1500 - w/RPO L92) >> Installation Procedure

Installation Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Exhaust System Hangers & Insulators
    GM1708986Courtesy of GENERAL MOTORS CORP.
  1. If the vehicle is a Yukon XL, Yukon Denali XL, Escalade ESV, or Escalade EXT perform the following steps, otherwise proceed to step 6.
  2. Lubricate the insulators where the muffler assembly hangers are inserted for ease of installation.
    3. IMPORTANT: During installation, do not over extend the flex coupler as internal damage may occur.
  3. With the aid of an assistant, install the muffler assembly.
  4. With the aid of an assistant, install the insulators to the exhaust system hangers (3, 4, and 5).
    5. Fig 2: View Of Exhaust System Hangers & Insulator
    GM1708987Courtesy of GENERAL MOTORS CORP.
  5. With the aid of an assistant, Install the insulator to the exhaust system hanger near the resonator.
    6. Fig 3: View Of Exhaust System Hangers & Insulators
    GM1708981Courtesy of GENERAL MOTORS CORP.
  6. If the vehicle is a Yukon Denali or Escalade perform the following.
  7. Lubricate the insulators where the muffler assembly hangers are inserted for ease of installation.
  8. With the aid of an assistant, install the muffler assembly.
  9. With the aid of an assistant, install the insulators to the exhaust system hangers (2, and 3).
    10. Fig 4: View Of Exhaust System Hangers & Insulator
    GM1708983Courtesy of GENERAL MOTORS CORP.
  10. Install the insulator to the exhaust system hanger near the resonator.
    11. Fig 5: View Of Catalytic Converter To Muffler Nuts (RPO L92)
    GM1708979Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  11. Install the muffler to catalytic converter nuts.

    Tighten:  Tighten the nuts to 45 N.m (33 lb ft).

  12. Install the insulator to the hanger.
  13. Raise the rear axle into position using the adjustable jack.
    14. Fig 6: View Of Right Axle Tie Rod Bolt & Nut
    GM1709061Courtesy of GENERAL MOTORS CORP.
  14. Install the right rear shock absorber lower bolt and nut.

    Tighten:  Tighten the bolt/nut to 95 N.m (70 lb ft).

  15. Install the right rear stabilizer shaft link to the frame.
  16. Install the right rear stabilizer shaft link to frame bolt and nut.

    Tighten:  Tighten the bolt/nut to 65 N.m (48 lb ft).

  17. Install the right rear axle tie rod bolt (2) and nut (1).

    Tighten:  Tighten the bolt/nut to 105 N.m (77 lb ft).

    18. Fig 7: Rear Axle Vent Hose (8.6 or 9.5 Inch Ring Gear)
    GM692548Courtesy of GENERAL MOTORS CORP.
  18. Install the rear axle vent hose to the rear axle, if necessary.
  19. Install the vent hose swivel clip to the rear brake crossover pipe, if necessary.
  20. Using the J 38185  install the right rear link rod to the ball studs on the sensors.
    21. IMPORTANT: The rear axle wiring harness clip (1) is a one way clip with a D-shape section. The clip can only be installed and/or removed in only one direction.
  21. Install the right rear wheel speed sensor wiring harness clips to the frame and the control arm bracket.
  22. Install the right rear wheel speed sensor wiring harness electrical connector clip to the frame.
    23. Fig 8: View Of Chassis Wiring Harness Electrical Connectors & Right Rear Wheel Speed Sensor Wiring Harness Electrical Connector
    GM1709051Courtesy of GENERAL MOTORS CORP.
  23. If the vehicle is equipped with RPO Z55, connect the right rear air line to the shock absorber.
  24. If the vehicle is equipped with RPO Z55, connect the chassis wiring harness electrical connector (3) to the right rear shock absorber.
  25. Connect the chassis wiring harness electrical connector (1) to the right rear wheel speed sensor wiring harness electrical connector (2).
  26. Install the right rear wheel and tire. Refer to Tire and Wheel Removal and Installation .
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