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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1038 (Engine Exhaust System) >> Repair Instructions >> Muffler Replacement (2500/3500 Series w/6.0L) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Rear Axle Vent Hose (8.6 or 9.5 Inch Ring Gear)
    GM692548Courtesy of GENERAL MOTORS CORP.
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the spare tire, if necessary.
  3. Install adjustable jack stands under the rear axle, if necessary.
  4. If equipped with a 8.6 or a 9.5 inch ring gear, remove the rear axle vent hose from the rear axle, if necessary.
  5. Remove the vent hose swivel clip from the rear brake crossover pipe, if necessary.
    6. Fig 2: Rear Axle Vent Hose (10.5 Inch Ring Gear)
    GM695038Courtesy of GENERAL MOTORS CORP.
  6. If equipped with a 10.5 inch ring gear, remove the rear axle vent hose from the rear axle, if necessary.
  7. Remove the vent hose swivel clip from the rear brake crossover pipe, if necessary.
    8. Fig 3: Rear Shock Absorber Bolts And Nuts (6.0L, 6.6L, and 8.1L Engines)
    GM665315Courtesy of GENERAL MOTORS CORP.
  8. Remove the rear shock absorber lower bolts and nuts, if necessary.
  9. Lower the rear axle using the adjustable jack stands, if necessary.
    10. Fig 4: View Of Catalytic Converter To Muffler Nuts
    GM1708979Courtesy of GENERAL MOTORS CORP.
  10. Remove the muffler to catalytic converter nuts.
    11. Fig 5: View Of Muffler Assembly Insulators
    GM1856703Courtesy of GENERAL MOTORS CORP.
  11. If the vehicle is a non heavy duty (HD), perform the following steps, otherwise proceed to step 14:
  12. Lubricate the 4 insulators where the muffler assembly hangers are inserted in order to ease removal.
  13. With the aid of an assistant, remove the insulators (1-4) from the front, intermediate, and rear muffler assembly hangers and remove the muffler assembly.
    14. Fig 6: View Of Muffler Assembly Insulators
    GM1856702Courtesy of GENERAL MOTORS CORP.
  14. If the vehicle is a heavy duty (HD) perform the following steps:
  15. Lubricate the 3 insulators where the muffler assembly hangers are inserted in order to ease removal.
  16. With the aid of an assistant, remove the insulators (1-3) from the front, intermediate, and rear muffler assembly hangers and remove the muffler assembly.
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