GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2006 🢒 GMC Sierra Denali 🢒 Engine 🢒 Engine Controls - 4.3L 🢒 Intake Manifold Cleaning and Inspection

    Caution: Refer to Safety Glasses Caution in the Preface section.


    Object Number: 334515 Size: SH
  1. Clean the upper intake manifold in cleaning solvent.
  2. Dry the upper intake manifold with compressed air.

    3. Object Number: 859860 Size: SH
  3. Clean the lower intake manifold in cleaning solvent.
  4. Dry the lower intake manifold with compressed air.

    5. Object Number: 480569 Size: SH
  5. Inspect the upper intake manifold for the following:
    6. • Cracks or other damage to the exterior (1)
    • Cracking or damage in the gasket grooves (2) and (3)
    • Damage to the throttle body mounting surface (4)
    • Loose or damaged bolt hole thread inserts (5)

    Object Number: 859864 Size: SH
  6. Inspect the lower intake manifold for the following:
    7. • Damage to the gasket sealing surfaces (1) and (2)
    • Restricted cooling system passages (3)
    • Cracks or damage
    • Damage to the threaded bolt holes