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Home >> GMC >> 2001 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 4.8L, 5.3L, And 6.0L - Repair Instructions >> Repair Instructions >> Idle Air Control Valve Replacement >> Removal Procedure
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Removal Procedure

    Fig 1: View Of TP Sensor & IAC Valve Electrical Connectors
    GM389028Courtesy of GENERAL MOTORS COMPANY
  1. Disconnect the idle air control (IAC) valve electrical connector.
    2. Fig 2: View Of TP Sensor, IAC Valve & Components
    GM356448Courtesy of GENERAL MOTORS COMPANY
  2. Remove the IAC valve attaching screws (4).
  3. Remove the IAC valve (3).
  4. Remove the IAC valve O-ring seal (2).
  5. Clean the IAC valve O-ring sealing surface, the pintle valve seat, and the air passage.
    • Clean the IAC valve using GM cleaner P/N 1052626 or GM X-66A. Use a shop towel or parts brush to remove heavy deposits.
    • If the air passage has heavy deposits, remove the throttle body for complete cleaning.
    • Shiny spots on the pintle or seat are normal and do not indicate misalignment or a bent pintle shaft.
  6. Inspect the IAC valve O-ring for cuts, cracks, or distortion. Replace the O-ring if the O-ring is damaged.
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