GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 Yukon XL - 4WD 🢒 Engine 🢒 Engine Controls - 8.1L 🢒 Exhaust Gas Recirculation Pipe Replacement

Removal Procedure

    Object Number: 843784 Size: SH
  1. Remove the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical - 8.1L.
  2. Remove the exhaust gas recirculation (EGR) valve pipe bolts (3).
  3. Remove the bolt (4) from the right side head.
  4. Remove the EGR valve pipe nuts (5).
  5. Remove the EGR valve pipe (2).
  6. Remove the EGR gaskets (1).
  7. Clean the EGR valve pipe mounting surfaces.

Installation Procedure

    Object Number: 843784 Size: SH
  1. Install NEW EGR gaskets (1).
  2. Install the EGR valve pipe (2).

    3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the EGR valve pipe bolts (3).

    4. Tighten
    Tighten the bolts to 25 N·m (18 lb ft).

  4. Install the bolt (4) to the right side head.

    5. Tighten
    Tighten the bolt to 50 N·m (37 lb ft).

  5. Install the EGR valve nuts (5).

    6. Tighten
    Tighten the nuts to 25 N·m (18 lb ft).

  6. Install the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical - 8.1L.