GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 Yukon - 4WD 🢒 Engine 🢒 Engine Mechanical - 4.8L, 5.3L, and 6.0L 🢒 Valve Rocker Arm Cover Installation - Left Side

    Object Number: 490696 Size: SH

    Important: 

       • All gasket surfaces should be free of oil or other foreign material during assembly.
       • DO NOT use the valve rocker arm cover gasket again.
       • The valve rocker arm cover bolt grommets may be used again.
       • If the vapor vent grommet has been removed from the valve rocker arm cover, install a NEW vapor vent gourmet during assembly.

  1. Install a NEW cover gasket (1) into the valve rocker arm cover.

    2. Object Number: 260085 Size: SH
  2. Install the valve rocker arm cover onto the cylinder head.

    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 cover bolts with grommets.

    4. Tighten
    Tighten the valve rocker arm cover bolts to 12 N·m (106 lb in).


    Object Number: 260083 Size: SH
  4. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the threads of the bracket bolts.
  5. Install the ignition coils and bracket assembly and bolts.

    6. Tighten
    Tighten the ignition coil and bracket assembly bolts to 12 N·m (106 lb in).