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Registered
2006 CTS 2.8L
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2,471 Posts
Even if you have no active service, OnStar is still enabled in your car. Just hit the call button...
 

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Registered
2003 CTS Manual Trans., '93 STS
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3,035 Posts
Samir,

Disassemble the trunk panels: The spare tire cover is first, then the rear (near the bumper), then the bottom, then the passenger side panel. The silver box mounted just in front of the brake light is the VCC (Vehicle Cellular Communications) box or more commonly known as the 'On-Star' box. It does more than just call On-Star. It enables voice commands if you have a Nav, and also enables cellular phone calls from within the car using it's own 'phone'. If you just want to disable sending and receiving On-Star (and as a result cell calls from the car) just pull the antenna. It's not rocket science and it's the large N-size coax connector on the top. If you want to disable everything, just pull the two wire connectors out of the side of the box. That's all there is to it. No schematics needed!

If you truly want to know the pin-outs of the connectors, and see a picture of the On-Star box in it's glory, go here:

http://cadillacfaq.com/faq/answers/navpart2/index.html

Although it doesn't seem like it lately, this site does occasionally discuss more than exhausts and wheels.
 

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Registered
'04 CTS
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43 Posts
I'd like to find a way to use the OnStar call button on the steering wheel for an entirely different purpose... a CANCEL button for the cruise control. Having to tap the break is a real pain in the butt. My '02 Olds Intrigue has a cancel button so why not the CTS?

Strud
 

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Registered
2007 CTS
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582 Posts
They have contracted with alien beings from outer space for this feature.
Not another one on this. Where are the black helicopters? Sami you know On-Star could pinpoint your location if you were to get in an accident, airbags deployed, and you're knocked out. I think you're up to more then racing and privacy for this.
 

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Cadillac Technician
none
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11,051 Posts
The module is actually referred to as a VCIM.
On some cars you can unplug the box, on some it will cause other problems if you do.

If you do not have an active account for long enough, GM will turn your system off.
They don't keep it active to snoop. They have to pay rent on the phone number assigned to your vehicle so no contract = no phone number. They actually go into the module and change the number to 1234567890 and deactivate the module. When this is done the LED usually turns off. (instead of green)
Disconnecting the antennas will prevent the box from any outside communication, yet leave it connected to the vehicle's electronics to maintain any data that it may process for other modules (such as the VR signal for navigation)
The LED will turn red since a code will be set for loss of antenna signal.

GM cannot remotely shut your car down, more importantly via satellite.
The satellite portion of OnStar is only for GPS and the unit in the car is only a receiver. It picks up signals from the satellites and uses them to calculate your position, and nothing else.
Communication with the vehicle is handled via the cellular modem portion of the VCIM. They have to connect to the vehicle and interface with the VCIM to control the vehicle outputs, like honking the horn, flashing the lights, or unlocking the doors.
Without a cellular antenna they cannot make a connection to the car to do squat. As I said, this is done over a cell connection, it has nothing to do with satellites.

As for why you want to disconnect it, I don't really care.
I can make suppositions but they are unfounded and probably pretty silly.
;)

Hope this info is helpful.
 

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Cadillac CTS, Black Raven. Name: Car-los
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3,201 Posts

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91 Allante (gone), 06 SRX (gone)
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4,396 Posts
If you line the inside of a baseball cap with aluminum foil and then wear it backwards, you will be invisible to OnStar.
 

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Premium Member
2006 STS V8 AWD, '95 Ford Ranger
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28,970 Posts
If you line the inside of a baseball cap with aluminum foil and then wear it backwards, you will be invisible to OnStar.
The aluminum foil focuses the OnStar rays and makes you impotent. The only way to counteract OnStar is to subscribe to OffStar. I am setting up a web site that will enable you to send me $50 a month for this service.
 

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Registered
91 Allante (gone), 06 SRX (gone)
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4,396 Posts
What a deal. OffStar costs less than the monthly bill for aluminum foil and Viagra.
 

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Registered
Sedan de Ville, CTS
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4,764 Posts
The aluminum foil focuses the OnStar rays and makes you impotent. The only way to counteract OnStar is to subscribe to OffStar. I am setting up a web site that will enable you to send me $50 a month for this service.
I just faxed you $50. I will do that every month to maintain my subscription.
 
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