2005 Cadillac DeVille Protection SeriesFACTORY OEM SERVICE PROCEDURE

Installation Procedure

    Fig 1: Removing/Installing IAC Valve "O" Ring
    GM481091Courtesy of GENERAL MOTORS CORP.
  1. Install the new IAC valve O-ring.
    2. Fig 2: Identifying Idler Air Control Valve & Attaching Screws
    GM596334Courtesy of GENERAL MOTORS CORP.
  2. Install the IAC valve (1) into the throttle body.
    3. NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Install the IAC valve attaching screws (2) into the IAC valve.

    Tighten:  Tighten the IAC valve attaching screws to 3 N.m (27 lb. in.).

    4. Fig 3: IAC Valve and TP Sensor Component View
    GM574138Courtesy of GENERAL MOTORS CORP.
  4. Install the electrical connector (1) into the idle air control valve (4).
  5. The powertrain control module (PCM) will reset the idle air control valve whenever the ignition switch is turned ON, then OFF.
  6. Turn the ignition switch ON.
  7. Turn the ignition switch OFF.
  8. Perform the IAC Valve learn procedure.

    IAC Valve Learn Procedure

    1. Start and idle the engine for 15 seconds.
    2. Turn the ignition switch to the LOCK/OFF position.
    3. Wait 15 seconds.
    4. Restart the engine, and check for proper idle operation.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.