2005 Cadillac DeVille BaseFACTORY OEM SERVICE PROCEDURE

Removal Procedure

    Fig 1: View Of PCM & MAF/IAT Sensor
    GM622423Courtesy of GENERAL MOTORS CORP.
  1. Disconnect the mass air flow/intake air temperature (MAF/IAT) sensor electrical connector.
  2. Loosen the intake air duct clamp at the throttle body.
  3. Remove the bolts retaining the upper housing cover to the lower housing.
  4. Remove the upper housing cover and air intake duct from the throttle body and lower housing.
  5. Remove the powertrain control module (PCM) and connector assembly from the lower housing.
    6. Fig 2: View Of Air Cleaner Assembly Lower Housing
    GM622416Courtesy of GENERAL MOTORS CORP.
  6. Pull upwards to remove the lower housing from the locating pins.
    7. NOTE:
    • Handle the MAF sensor carefully.
    • Do not drop the MAF sensor in order to prevent damage to the MAF sensor.
    • Do not damage the screen located on the air inlet end of the MAF.
    • Do not touch the sensing elements.
    • Do not allow solvents and lubricants to come in contact with the sensing elements.
    • Use a small amount of a soap based solution in order to aid in the installation.
  7. If replacing the upper housing cover, be sure to transfer the air intake duct and MAF/IAT sensor to the replacement housing cover.
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.

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