2002 Deville Air Temperature Actuator Replacement (others similar)
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Cadillac Tech Tips - How to fix it Discussion, 2002 Deville Air Temperature Actuator Replacement (others similar) in Item Specific Cadillac Discussion; Greetings, I just replaced a faulty air temp actuator on my 2002 Cadillac DHS and would like to share the ...
  1. #1
    markmnj's Avatar
    markmnj is offline Cadillac Owners Fanatic
    Automobile(s): 1973 Cadillac Hearse, 2002 Cadillac DHS
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    2002 Deville Air Temperature Actuator Replacement (others similar)

    Greetings,

    I just replaced a faulty air temp actuator on my 2002 Cadillac DHS and would like to share the experience. Not difficult and takes about an hour and a half. Also detailed are the knee bolster removal steps to help you avoid breaking it. I always like to take my time with plastic trim.

    Symptoms:

    Persistent IPM B0429 code
    Intermittent popping sound from dashboard accompanied by incorrect air temperatures for REAR seat passengers.

    Tools -n- Parts Used

    1/4" drive socket set
    1/4" drive Torx bit set (for 1/4" ratchet)
    ACDelco 15-73428 replacement actuator

    Replacement

    1) Disconnect negative battery cable

    2) Remove the passenger side lower kick panel (2 small hex cap screws)

    3) Remove the passenger side knee bolster. No special tools needed. Bolster attachment clips are designed to pull free with a little force. Simply the knee bolster it on the top and bottom on one end and pull straight back toward you. Do the same on the other end then pull the remaining bottom section free in one even step. There are two clips on each end and three or four along the bottom. See pictures of removed bolster showing clip design and mounting hole locations.

    bolster clip.jpg
    clip hole.jpg

    3) Using the 1/4" Torx bit and ratchet, remove the glove compartment CD changer if equipped and the Torx screws holding the glove compartment in and gently pry the plastic glove compartment light/cover off.

    4) Pull the entire glove compartment out toward you. Disconnect the valet switch connector and allow the disconnected light and CD changer wiring to pass through their holes and remain behind. Unlike the knee bolster, the glove compartment will take little effort to pull free once all screws are removed.

    5) Remove the offending actuator. After unplugging, remove the two 5.5mm hex head screws. It may take a little working and pulling to free it from it's shaft. The photo below, shows the actuator as it sits and two arrows indicate the mounting screws.

    actuator.jpg

    6) Installation is the reverse of removal. By the time you are done, the battery will have been disconnected way long enough to allow the HVAC actuators to re calibrate themselves upon power up. After reassembly, re connect the battery, turn the key to "on", HVAC system/blower on and wait a few minutes to allow this. Turn key off, then back on, clear your codes and then it's business as usual.

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  3. #2
    eldoedwardo is offline Cadillac Owners Fanatic
    Automobile(s): '99 Eldorado coupe
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    Re: 2002 Deville Air Temperature Actuator Replacement (others similar)

    Hello, Is that the same component that lets air through thru the left and right side, mine is cold on drivers side warm on passenger side. It started (noticed it) two days after the battery terminal was loose then tightened up. Thanks Ed

  4. #3
    markmnj's Avatar
    markmnj is offline Cadillac Owners Fanatic
    Automobile(s): 1973 Cadillac Hearse, 2002 Cadillac DHS
    Join Date
    Oct 2013
    Location
    Hampton Township, NJ
    Posts
    113

    Re: 2002 Deville Air Temperature Actuator Replacement (others similar)

    No, this one only controls the air temperature for the rear or auxiliary air temp as it's called. If you had a loose battery connection, you may have one or more ofyour actuators out of sync. Completely disconnect both of your battery leads and hold the disconnected leads together for 5 or 10 seconds. That will remove any residual power in the system. When you reconect the battery, turn the key to the on position and leave it there for a couple of mins with the HVAC set to "auto". That will allow them to re sync/reset from zero and get things back to normal.

    If that doesn't work you'll need to dig deeper. Scan for codes using your car's built in scanner and repost your question and codes with their definitions in the discussion forum for your car: http://www.cadillacforums.com/forums...ldorado-forum/

    I don't think they intend this section for Q and A, just for how to reference write ups.

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