Hi All,

I am new to this forum, there's a great deal of useful information and I am already thankful for that.

I have a 64' Cadillac Sedan Deville hardtop and I am looking for two things:

1) I'd like to change the air convector system under the dashboard as it's broken. I am looking for something similar to this : https://www.speedwaymotors.com/Vintage-Air-Heritage-Series-Underdas..., but I am unsure how to confirm that would fit my Caddy. Would you have some advises/website/contact?

2) I'd like to have some added security regarding the starter. I have heard there's a kind of numeric key pad you can add next to the key starter to act as a safeguard (you type your digits and it starts the car). Has anyone used such and would know where to get one?

Thank you!

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Welcome to the Chapter! We are glad you're here!

Does your car have the Climate Control system? I can not personally attest to the quality of the factory air con in the 64 cars, but all reports indicate once you get the system functioning properly, it is EXCELLENT. I plan to diagnose my CC system this summer. We shall see how much of a lofty goal that is or not- I may end up spending more time on the road in my Fleetwood than it parked in the driveway for repairs!

I have not heard of such a device, but I am sure its out there. Are you routinely parking your car at night in the open? Or just worried about security in general? I find these cars to be unique and stand out enough, I don't worry beyond locking my doors. I don't think a thief would pick this car, there is no way they'd be able to sell it within a 500 mi radius-too unique. They are going for more common cars. Keep us updated if you find a good solution for a key pad lock out, that does sound interesting.


Thank you for your insight.

Yes I do have the Climate Control System and it worked great initially but the previous garage I put the car in did a huge mess and wrecked the system. We had to change lots of small parts but it's still not functioning properly and the dashboard vibrates a lot when I put heat/cold on. That's why I am looking to change that system.

For the key pad, it was more security in general, but I do visits friends at nights with it and park outside. And sure I will let you guys know if I find anything on it.


I am certainly surprised that no one has suggested Tim Groves book on the factory CC system. That may lead you to your answers. I have also read that the dash is not hard to remove on this year Cadillac. Perhaps popping the dash off would shine some light on what the previous repair shop did. 

You can order the book direct from Tim or Russ on here I believe is an authorized seller. 

As for security, I certainly think the chain idea and pulling the coil wire is the way to go. I am imagining that a security paid will be more trouble than its worth. 



You are correct about Russ being a supplier of the comfort control booklet by Cadillac Tim ( same price also ) 


Thank you Logan for the direction

My Cadillac is not often in an insecure location 

My solution has been to pull out the coil wire —and use a chain with a paddle lock around the front of the hood latch 

No one will be getting the car  started —but a tow truck will still be able to take it away with most other security measures in place 

I just keep the chain and lock in the trunk when the situation calls for it 

Good to know the car will still be there when I return 

Always owning convertibles I leave the car unlocked with nothing in it — or the top will get cut from my years of experience 

It’s a jungle out there - so far so good 


Hide an apple air tag in your car ( cost $30 ) and it will take you right to your cars location if  your car is stollen

Call the police —and get your care back real quick and catch the crooks —-a win win !! 


I've done some looking into the airtags, and my reading suggests that the airtag only locates as far as a Bluetooth connection will allow. I could be incorrect in this statement as I have only breifly looked-but I too had this idea and thought it a good one. 


I just put together a 63 AC system to bolt up into your 64. Remove the 64 system and put in the 63 system. Includes a new heater core and vacuum motor installed in the heater box.  New vacuum lines and the wire harness are included.   The 63 AC control head in the dash is included. 

This is a direct bolt in application. You will use your 64 blower case. 

63 system is 480.00 plus shipping.  email me at russ@thecadishack.com 

Thank you Russ, I will email you today.

IMO, the biggest problem with any security system that requires you to do something when you park the car, is that it's going to get forgotten some of the time.

I've had the numerical pad thingy on other cars, and it works, but does rewire cutting into your factory wiring, which may or may not be of a concern to you.

I use the coil wire trick whenever parking may Eldo overnight (very rare circumstance.)  I like the chain and padlock for the hood too. 

If cutting/splicing a couple of wires is okay with you, check out the RAVELCO device. I use that on all of my new cars that are prone to theft. I've never put it on any of my classics.  The system has been around for decades, and uses a removable pronged (male-side) cap that plugs into a female receptacle somewhere in your interior. Hide it or keep it in the open for ease of use.

All you have to do, is take the male-side cap with you when you leave the car. 

The company claims they've never heard of a car being stolen (by hot wiring) with their system installed. IDK if that's true, but it definitely keeps the car from starting, and no thief will take the time to figure out how it's wired in, as there are a few difference places/ways the installer does this.

As we all know: If a thief really wants the car, he'll get it. Towing a car away seems to be the preferred method these days. That's hard to prevent. 

Thanks for the trick and for that Ravelco device idea, I will definitely have a look and let you guys know how it works on my 64' if I go forward with it



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