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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1026 (Engine Controls And Fuel - 6.6L - Introduction (2 Of 2)) >> Repair Instructions >> Exhaust Pressure Differential Sensor Pipe Replacement (Cab/Chassis) >> Installation Procedure

Installation 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.
    IMPORTANT: A special anti-seize compound is used in the sensor or line fittings threads. The compound consists of liquid graphite and glass beads. The graphite tends to burn away, but the glass beads remain, making the sensor or line fitting easier to remove. New, or service replacement sensors or line fittings already have the compound applied to the threads. If the sensor or line fittings are removed from an exhaust component and if for any reason the sensor or line fitting are reinstalled, the threads must have anti-seize compound applied before reinstallation.
  1. If reinstalling the old temperature sensor or differential pressor sensor line fittings, coat the threads with anti-seize compound GM P/N 12377953, or equivalent.
    2. Fig 1: View Of Exhaust Differential Pressure Sensor Pipe Assembly
    GM1873499Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Ensure to route the pipe assembly over the frame crossmember.
  2. Position and install the exhaust differential pressure sensor pipe assembly to the vehicle.
    3. Fig 2: View Of Exhaust Differential Pressure Sensor Pipe Assembly Fittings
    GM1873498Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  3. Tighten the exhaust differential pressure sensor pipe assembly fittings (1).

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

    4. Fig 3: View Of Exhaust Differential Pressure Sensor Pipe Bracket Bolt & Nut
    GM1873495Courtesy of GENERAL MOTORS CORP.
  4. Position the exhaust differential pressure sensor pipe bracket to the exhaust hanger and install the bolt and nut.

    Tighten:  Tighten the bracket bolt/nut to 9 N.m (80 lb in).

    5. Fig 4: View Of Exhaust Differential Pressure Sensor, Bracket Bolts & Pipe Assembly Hose Clamps
    GM1873483Courtesy of GENERAL MOTORS CORP.
  5. Install the exhaust differential pressure sensor pipe assembly hoses to the sensor.
  6. Position the exhaust differential pressure sensor pipe assembly hose clamps (3).
  7. Lower the vehicle.
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