1994 Deville Heater Core
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 1994 Deville Heater Core in Past Cadillac Vehicle Discussion; This is my first time using a forum. So please bear with me. I'm trying to install a new heater ...
  1. #1
    GALEN2002 is offline Cadillac Owners Member
    Automobile(s): 1994 DEVILLE
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    1994 Deville Heater Core

    This is my first time using a forum. So please bear with me. I'm trying to install a new heater core. I have a Chilton book but it has no pictures or diagrams for this job. I was wondering if anyone out here has detailed pictures or diagrams for removing a heater core. If so could you please send to my email at g_mack2002@yahoo.com

    Thank you very much

    Also you can insert in this post the diagrams

    Thanks again

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  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 1994 Cadillac Deville Heater Core



    Haynes (and Chiltons) are rather useless for anything but the most basic of repairs. You really need a FSM by Helm Inc. Ebay is your friend.

    Check the Tech Tips section. You might find something in there.

    Not sure if this will help much.
    http://www.gmpartsgiant.com/Page_Pro...-031&SortKey=7

  4. #3
    dennis93coupe's Avatar
    dennis93coupe is offline Cadillac Owners Connoisseur
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    Re: 1994 Cadillac Deville Heater Core

    ^^^^^ Like Ranger said, get the FSM. Your car takes 2 volumns. Here's a link to the books on ebay. I noticed there is a pair up for bid ending in 2 days for 15 or 16 bucks plus shipping. That is an excellant price if you are interested.

    http://motors.shop.ebay.com/i.html?_...506.m270.l1313

  5. #4
    94 sedan base is online now Cadillac Owners Member
    Automobile(s): 94 Deville 01 Deville DTS
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    Re: 1994 Cadillac Deville Heater Core

    I replaced mine a year ago & it wasn't bad.You have to remove it on the passenger side under the dash,be sure to remove the heater hoses from it prior to getting it out.

  6. #5
    GALEN2002 is offline Cadillac Owners Member
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    Re: 1994 Cadillac Deville Heater Core

    Thanks

  7. #6
    GALEN2002 is offline Cadillac Owners Member
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    Re: 1994 Cadillac Deville Heater Core

    Update on heater core job. I paid a guy to help me with the heater core job. I think the heater core is in correct now air is not comin thru my vents. Can anyone help with some kind of detailed step by step pics so I can go back thru and see whats not connected

    Thanks

  8. #7
    bigm57ict's Avatar
    bigm57ict is offline Cadillac Owners Connoisseur
    Automobile(s): 1995 Sedan DeVille, 1979 Coupe deVille
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    Re: 1994 Cadillac Deville Heater Core

    Are you trying to get heated air through the dashboard vents?
    It won't happen. Heat comes out the floor and windshield area only. This is automatic and cannot be changed on a '94.
    That's assuming you set the temp on "90" to force the heat to come out.
    If air is not coming through the vents when its is set on "auto", then you do have a problem. Possibly a vacuum leak. Does the Automatic Park Brake release work?

  9. #8
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 1994 Cadillac Deville Heater Core


  10. #9
    GALEN2002 is offline Cadillac Owners Member
    Automobile(s): 1994 DEVILLE
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    Re: 1994 Cadillac Deville Heater Core

    Thank you very much great pics. The pics for the heater core removal like this would really help me too

  11. #10
    frostycadillac is offline Cadillac Owners Member
    Automobile(s): 1968 DeVille, 1985 Seville, 1990 Deville, 1994 Deville,
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    Re: 1994 Cadillac Deville Heater Core

    I replaced my heater core last year, unfortunately for no reason. It wasn't the heater core that was bad, it was the air door module that was bad. While you have things open under there, move your climate control from heat (anything above 80) then look at the top of the module under the passenger side dash. You will notice the arm on the air control door moving. Check it again when you move the climate control back to a colder temp to force the ac to come on. Also, a little tip, you can pull the codes from the computer using the climate control buttons by holding OFF and HEAT together at the same time, your car will cycle through PCM, IRC, and so on. Look up any codes that are current. If the air door is the problem, the computer will tell you. The FSM are like your Bible, I can't tell you how many times that book ends up in my bathroom!

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