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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 Cab Chassis and 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: View Of Muffler Assembly Insulators
    GM1856704Courtesy of GENERAL MOTORS CORP.
  1. Lubricate the 4 insulators where the muffler assembly hangers are inserted in order to ease installation.
  2. With the aid of an assistant, position and install the muffler assembly.
  3. Install the insulators (1-4) to the front, intermediate, and rear muffler assembly hangers.
    4. Fig 2: View Of Exhaust Muffler, Exhaust Manifold Pipe, Gasket & Nuts
    GM1856230Courtesy of GENERAL MOTORS CORP.
  4. Install the HO2S. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (2500 Series - Cab/Chassis) or Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (2500 Series) or Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (1500 Series) .
    5. CAUTION: Refer to Fastener Caution .
  5. Tighten the exhaust muffler clamp (3) to 47 N.m (35 lb ft).
  6. Install the exhaust muffler to exhaust manifold pipe nuts (1) and tighten to 45 N.m (33 lb ft).
    7. Fig 3: Identifying Rear Shock Absorbers Lower Bolts & Nuts
    GM665315Courtesy of GENERAL MOTORS CORP.
  7. Raise the rear axle using the adjustable jack stands, if necessary.
  8. Install the rear shock absorber lower bolts and nuts, if necessary and tighten to 95 N.m (70 lb ft).
    9. Fig 4: View Of Rear Axle Vent Hose (10.5 Inch Ring Gear)
    GM695038Courtesy of GENERAL MOTORS CORP.
  9. If equipped with a 10.5 inch ring gear, install the rear axle vent hose to the rear axle, if necessary.
  10. Connect the vent hose swivel clip to the rear brake crossover pipe, if necessary.
    11. Fig 5: View Of Rear Axle Vent Hose (8.6 or 9.5 Inch Ring Gear)
    GM692548Courtesy of GENERAL MOTORS CORP.
  11. 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.
  12. Install the vent hose swivel clip to the rear brake crossover pipe, if necessary.
  13. Remove the adjustable jack stands from under the rear axle, if necessary.
  14. Install the spare tire, if necessary.
  15. Lower the vehicle.
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