1994-1999 Cadillac Deville Blower Motor Replacement
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Cadillac Tech Tips - How to fix it Discussion, 1994-1999 Cadillac Deville Blower Motor Replacement in Item Specific Cadillac Discussion; Recently i discovered that my blower motor had stopped working and was in need of replacement. I searched around online ...
  1. #1
    cjk5083 is offline Cadillac Owners Member
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    1994-1999 Cadillac Deville Blower Motor Replacement

    Recently i discovered that my blower motor had stopped working and was in need of replacement. I searched around online to see the best way of going at it, and it wasn't good. There is a slight lack of room which is needed to physically pull the motor out. Some people have gotten around this by:
    . - unbolting the engine and jacking it up with a floor jack
    . - Using a Ratchet strap and forcing the engine forward 1-2"
    . - Using a Pry-Bar to pull the engine forward
    . - Using brute force and most often cracking the housing of the old and new blower motor
    Now i don't know if this has any effect on the performance of the new blower motor assembly, but i found a MUCH easier way of replacing this specific part.

    Part One: Remove the old blower motor
    1. Remove cross bar connected to Strut towers
    2. Mark or label all sparkplug wires and remove them from the coil packs
    3. Remove Coil packs and rear sparkplug wires
    4. remove the three bolts on the back side of the Blower Motor (Not the 5 around the edges)
    5. Remove the large metal plate you just unbolted
    6. Remove the 5 surrounding bolts on the perimeter.
    7. Pull the old motor out (Becasue you pulled off the large metal bracket in the back, the motor with fan and the seperate housing now come apart for easy extraction)

    Part 2: Install new Blower Motor
    NOTE: I do not know how if this works for the replacement motors from GM. I bought a used motor off of eBay. The only difference i know of between the original part and the new replacement part is that the new part only uses 3 bolts to hold the Motor in place, not the original 5
    1. Unbolt the 3 bolts on the back of the new Blower Motor and remove the large metal plate
    2. disassemble the Blower Motor into 3 parts
    . -Fan/motor
    . -Housing
    . -Backing plate (Large metal plate which was just removed)
    3. Insert fan first, fallowed by the housing
    4. Insert bolts through the backing plate, through the housing, into the fan/motor assembly and everything will be back 100% Back together
    5. Tighten down the 5 bolts on the housing of the Motor
    6. Reattach Plug wires and coil packs
    7. Reattach strut support
    8. Miller Time

    NOTE: This is a good time to replace your spark Plugs. Everything is all clear in the back and makes access to the rear sparkplugs 1000x easier!


    Pics soon...

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  3. #2
    urbanski is offline Cadillac Owners 10000+ Posts
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    Re: 1994-1999 Cadillac Deville Blower Motor Replacement

    thanks for the tips

  4. #3
    bradmo is offline Cadillac Owners Member
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    Exclamation Re: 1994-1999 Cadillac Deville Blower Motor Replacement

    This is GREAT info!!! Works very well!
    Additional tip:
    If using a one-piece replacement motor - they are VERY fragile. The printed circuit board inside will break if almost ANY pressure is applied while installing!
    You may find it necessary to slightly trim the hole in the firewall to ease the installation process. Less that a 1/4" in the right place(s) will give you all the room you need.
    Just be sure to apply no pressure trying to install the new motor or you will be buying another one!

  5. #4
    nekobarnes is offline Cadillac Owners Member
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    Re: 1994-1999 Cadillac Deville Blower Motor Replacement

    I found that an easier way of installing the blower and getting around the lack of room is by cutting about of half inch of plastic from the back end of the blower where you bolt the screws into the hole. Just be careful not to get too close to the holes where the screws need to go thru. After toying around with the idea of removing the motor mounts and rocking the motor in order to get clearance i realized at that time i did not have the tools, so i got my box cutter and started to trim away until the blower slid into place, this took me about 15 minutes. This is my best advice to others who dont have the tools or patience to rock the motor over.

  6. #5
    turbojimmy's Avatar
    turbojimmy is offline Cadillac Owners Connoisseur
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    Re: 1994-1999 Cadillac Deville Blower Motor Replacement

    I don't know why my 1995 Deville Concours is different, but here is what I had to do:

    - Remove the strut tower brace
    - Cut the rubber/plastic blower box insulation where it says "CUT HERE". Open it to expose the metal heater box and the shroud affixed to the blower motor housing (see the pic below).
    - Unclip the big wiring harness that runs along the back of the engine (technically the right side of the engine) and lift it up and over the engine lift attachment point to get it out of your way.
    - Using a 9/32" socket, remove the 4 bolts around the perimeter of the motor housing.
    - Remove the 5th 9/32" bolt that affixes the plastic shroud to the blower housing.
    - Tilt the motor and lift the squirrel cage up through the access hole in the blower box

    There was no need for me to remove the coil packs or move the engine out of the way.

    Pics:




  7. #6
    bonehead79 is offline Cadillac Owners Member
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    Re: 1994-1999 Cadillac Deville Blower Motor Replacement

    When it comes to installing a new blower motor in a 1994-99 Deville its a piece of cake. All you have to do is remove the coil packs off the back of the motor don't have to remove the plug wires just the wires to the packs,move it out of the way then,next remove the two motor mounts bolts (dog bones) and swing them up then all you have to do is loose up the front engine cradle bolts you DONT have to take them all the way out then takea nylon strap or cargo strap and pull the motor forward you will have plenty of room its only about a 25 minute job if your good and have air tools and this way you dont have to hack you car up like ive seen some

  8. #7
    jgajito is offline Cadillac Owners Member
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    Re: 1994-1999 Cadillac Deville Blower Motor Replacement

    Quote Originally Posted by cjk5083 View Post
    Recently i discovered that my blower motor had stopped working and was in need of replacement. I searched around online to see the best way of going at it, and it wasn't good. There is a slight lack of room which is needed to physically pull the motor out. Some people have gotten around this by:
    . - unbolting the engine and jacking it up with a floor jack
    . - Using a Ratchet strap and forcing the engine forward 1-2"
    . - Using a Pry-Bar to pull the engine forward
    . - Using brute force and most often cracking the housing of the old and new blower motor
    Now i don't know if this has any effect on the performance of the new blower motor assembly, but i found a MUCH easier way of replacing this specific part.

    Part One: Remove the old blower motor
    1. Remove cross bar connected to Strut towers
    2. Mark or label all sparkplug wires and remove them from the coil packs
    3. Remove Coil packs and rear sparkplug wires
    4. remove the three bolts on the back side of the Blower Motor (Not the 5 around the edges)
    5. Remove the large metal plate you just unbolted
    6. Remove the 5 surrounding bolts on the perimeter.
    7. Pull the old motor out (Becasue you pulled off the large metal bracket in the back, the motor with fan and the seperate housing now come apart for easy extraction)

    Part 2: Install new Blower Motor
    NOTE: I do not know how if this works for the replacement motors from GM. I bought a used motor off of eBay. The only difference i know of between the original part and the new replacement part is that the new part only uses 3 bolts to hold the Motor in place, not the original 5
    1. Unbolt the 3 bolts on the back of the new Blower Motor and remove the large metal plate
    2. disassemble the Blower Motor into 3 parts
    . -Fan/motor
    . -Housing
    . -Backing plate (Large metal plate which was just removed)
    3. Insert fan first, fallowed by the housing
    4. Insert bolts through the backing plate, through the housing, into the fan/motor assembly and everything will be back 100% Back together
    5. Tighten down the 5 bolts on the housing of the Motor
    6. Reattach Plug wires and coil packs
    7. Reattach strut support
    8. Miller Time

    NOTE: This is a good time to replace your spark Plugs. Everything is all clear in the back and makes access to the rear sparkplugs 1000x easier!


    Pics soon...
    Did you ever get around to those photos?

  9. #8
    mart88 is offline Cadillac Owners Member
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    Re: 1994-1999 Cadillac Deville Blower Motor Replacement

    Thanks for the tips!

  10. #9
    fosterdes64 is offline Cadillac Owners Member
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    Re: 1994-1999 Cadillac Deville Blower Motor Replacement

    I Just bought a 1996 Concours.The fan just stopped blowing like I turned it off on purpose.How can I test it to see if I need the relay,fan motor,?? Any help greatly appreciated!

  11. #10
    nekobarnes is offline Cadillac Owners Member
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    Re: 1994-1999 Cadillac Deville Blower Motor Replacement

    YOU DO NOT NEED TO DROP THE CRADLE! Simply remove the 4 bolts from the back of the revised blower and it will slide right in provided you moved the harness. Once you have it in place simply install the 4 bolts that you removed previously and then bolt it up to the car and your done. It took me awhile to figure this out but once I had I had it installed in my car in under 20 minutes.

  12. #11
    nekobarnes is offline Cadillac Owners Member
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    Re: 1994-1999 Cadillac Deville Blower Motor Replacement

    Ok, here is a photo example of what I mean..remove the 4 bolts from the back of the blower and with a little care and positioning it will go in without destroying the unit. Reassemble after getting it in.


    [IMG] Uploaded with ImageShack.us[/IMG]

  13. #12
    cycotom is offline Cadillac Owners Member
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    Re: 1994-1999 Cadillac Deville Blower Motor Replacement

    Just wanted to thank the other posters here for the step by step instructions. I recently replaced my blower. I guess this would explain why it wasn't blowing:

  14. #13
    turbojimmy's Avatar
    turbojimmy is offline Cadillac Owners Connoisseur
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    Re: 1994-1999 Cadillac Deville Blower Motor Replacement

    Quote Originally Posted by turbojimmy View Post
    I don't know why my 1995 Deville Concours is different, but here is what I had to do:

    - Remove the strut tower brace
    - Cut the rubber/plastic blower box insulation where it says "CUT HERE". Open it to expose the metal heater box and the shroud affixed to the blower motor housing (see the pic below).
    - Unclip the big wiring harness that runs along the back of the engine (technically the right side of the engine) and lift it up and over the engine lift attachment point to get it out of your way.
    - Using a 9/32" socket, remove the 4 bolts around the perimeter of the motor housing.
    - Remove the 5th 9/32" bolt that affixes the plastic shroud to the blower housing.
    - Tilt the motor and lift the squirrel cage up through the access hole in the blower box

    There was no need for me to remove the coil packs or move the engine out of the way.

    Pics:



    Fixed pics.

  15. #14
    wkearns is offline Cadillac Owners Member
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    Re: 1994-1999 Cadillac Deville Blower Motor Replacement

    Quote Originally Posted by nekobarnes View Post
    Ok, here is a photo example of what I mean..remove the 4 bolts from the back of the blower and with a little care and positioning it will go in without destroying the unit. Reassemble after getting it in.


    [IMG] Uploaded with ImageShack.us[/IMG]
    Hi, I'm trying to repeat your process with my 97 deville. I have the identical blower to yours. Did you pull off the fan first? I don't seem to have enough clearance to get the fan/motor combination in although I've trimmed around the hole to make it larger. If I remove the fan I can get the motor & inertial plate in ok, but I'm left with how to secure the nut that holds the fan blade assembly on.
    Thanks!

  16. #15
    Chevyman1978 is offline Cadillac Owners Member
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    Re: 1994-1999 Cadillac Deville Blower Motor Replacement

    First off thanks to all that posted in here on this subject. I was glad to have some knowledge before tearing into this project. I have ran into somewhat of an unusual problem I guess. I replaced the blower motor on a 1999 Deville and put the whole thing back together again only to hear a disturbing noise.. the fan was making contact within it's housing. I was not quick enough to shut it down as the squirrel cage flew apart. After disassembling everything (again) I found what I thought I had heard. The new fan is slightly bigger in diameter than the original and it made contact on the wall on the passenger side of the fan opening. Has anyone ran into this? If so, how did you fix it? I have a new motor and fan, but don't wish the same thing to happen...(it is a very time consuming job).

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