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Home >> GMC >> 2005 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 223 (Engine Mechanical - 3.6L (Ly7) (4 Of 6)) >> Off-Vehicle Repair Instructions - Part 2 >> Intake Manifold Cleaning and Inspection >> Upper Intake Manifold Cleaning Procedure

Upper Intake Manifold Cleaning Procedure

WARNING: This page is about a different car, the 2005 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove any remaining gasket and/or gasket material from the following:
    • Throttle body
    • Intake manifold
  2. Clean the following intake manifold areas in solvent.
    • Intake manifold gasket sealing areas
    • Intake manifold passages
    • Brake booster hose passage
    • Evaporative (EVAP) solenoid passage
    • Positive crankcase ventilation (PCV) vacuum hose passages
    • Manifold absolute pressure (MAP) sensor passage
  3. CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
  4. Dry the upper intake manifold and throttle body with compressed air.