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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1054 (Engine Exhaust System) >> Repair Instructions >> Exhaust Seal Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the exhaust manifold pipe seal(s).
    Fig 1: Left Exhaust Manifold Pipe Nuts (6.0L or 8.1L Engine)
    GM858568Courtesy of GENERAL MOTORS CORP.
  2. Raise the catalytic converter or exhaust manifold pipe using the adjustable jackstands.
    3. NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. If equipped with a 6.0L or 8.1L engine, perform the following:
    1. Install the exhaust hanger mounting bracket bolts.
    2. Install the left exhaust manifold pipe nuts.

      Tighten: 

      • Tighten the bolts to 12 N.m (106 lb in).
      • Tighten the nuts to 50 N.m (39 lb ft).

    4. Fig 2: Exhaust Manifold Pipe Nuts (6.0L, 6.6L, and 8.1L Engines)
    GM858574Courtesy of GENERAL MOTORS CORP.
  4. If equipped with a 6.0L or 8.1L engine, install the right exhaust manifold pipe nuts.

    Tighten:  Tighten the nuts to 50 N.m (39 lb ft).

    5. Fig 3: View Of Right Exhaust Pipe Nuts
    GM858553Courtesy of GENERAL MOTORS CORP.
  5. If equipped with a 4.3L, 4.8L, or 5.3L engine, install the right exhaust manifold pipe nuts.
    6. Fig 4: View Of Left Exhaust Manifold Pipe & Nuts
    GM858550Courtesy of GENERAL MOTORS CORP.
  6. If equipped with a 4.3L, 4.8L, or 5.3L engine, install the left exhaust manifold pipe nuts.

    Tighten:  Tighten the nuts to 50 N.m (39 lb ft).

    7. Fig 5: View Of Transmission & HO2S Sensor Electrical Connector
    GM665040Courtesy of GENERAL MOTORS CORP.
  7. If equipped with a 6.0L or 8.1L engine, perform the following:
    1. Connect the oxygen sensor electrical connector (1).
    2. Connect the CPA retainer.
  8. Remove the adjustable jackstands from catalytic converter or exhaust manifold pipe.
    9. Fig 6: View Of O2 Sensor Harness Routing
    GM664951Courtesy of GENERAL MOTORS CORP.
  9. If equipped with a 4.3L, 4.8L, or 5.3L engine, perform the following:
    1. Connect the oxygen sensor electrical connector (1).
    2. Connect the CPA retainer.
    3. Clip the oxygen sensor electrical connector to the hose clip.
    10. Fig 7: View Of O2 Sensor Harness Routing And Harness Mounting Brackets
    GM664828Courtesy of GENERAL MOTORS CORP.
  10. If equipped with a 4.3L, 4.8L, or 5.3L engine, perform the following:
    1. Connect the forward oxygen sensor electrical connector.
    2. Connect the CPA retainer.
    3. Install the clip around the engine harness and the oxygen sensor pigtail.
  11. Lower the vehicle.
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