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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1391 (Engine Exhaust System) >> Repair Instructions >> Exhaust Muffler Replacement (With 2500 or 3500 With 6.0L) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Muffler Assembly Insulators
    GM1856703Courtesy of GENERAL MOTORS CORP.
  1. If the vehicle is a non HD, perform the following steps, otherwise proceed to step 5:
  2. Lubricate the 4 insulators where the muffler assembly hangers are inserted in order to ease installation.
  3. With the aid of an assistant, position and install the muffler assembly.
  4. Install the insulators (1-4) to the front, intermediate, and rear muffler assembly hangers.
    5. Fig 2: View Of Muffler Assembly Insulators
    GM1856702Courtesy of GENERAL MOTORS CORP.
  5. If the vehicle is a HD, perform the following steps:
  6. Lubricate the 3 insulators where the muffler assembly hangers are inserted in order to ease installation.
  7. With the aid of an assistant, position and install the muffler assembly.
  8. Install the insulators (1-3) to the front, intermediate, and rear muffler assembly hangers.
    9. Fig 3: View Of Catalytic Converter To Muffler Nuts (RPO L92)
    GM1708979Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Fastener Caution .
  9. Install the catalytic converter to exhaust muffler nuts and tighten to 45 N.m (33 lb ft).
    10. Fig 4: Identifying Rear Shock Absorbers Lower Bolts & Nuts
    GM665315Courtesy of GENERAL MOTORS CORP.
  10. Raise the rear axle using the adjustable jack stands, if necessary.
  11. Install the rear shock absorber lower bolts and nuts, if necessary and tighten to 95 N.m (70 lb ft).
    12. Fig 5: View Of Rear Axle Vent Hose (10.5 Inch Ring Gear)
    GM695038Courtesy of GENERAL MOTORS CORP.
  12. If equipped with a 10.5 inch ring gear, install the rear axle vent hose to the rear axle, if necessary.
  13. Connect the vent hose swivel clip to the rear brake crossover pipe, if necessary.
    14. Fig 6: View Of Rear Axle Vent Hose (8.6 or 9.5 Inch Ring Gear)
    GM692548Courtesy of GENERAL MOTORS CORP.
  14. If equipped with a 8.6 or a 9.5 inch ring gear, install the rear axle vent hose to the rear axle, if necessary.
  15. Install the vent hose swivel clip to the rear brake crossover pipe, if necessary.
  16. Remove the adjustable jack stands from under the rear axle, if necessary.
  17. Install the spare tire, if necessary.
  18. Lower the vehicle.
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