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GM's OnStar: Pulling the plug on Big Brother.

 


ocalhoun
So, recently two facts came to my attention:

1: GM's OnStar system, which my truck has, can not only track your movements and speed, but also can remotely slow down or shut off the vehicle. And it could be used to listen in on any conversation inside the vehicle. (Even if you're not subscribed to the service.)

2: The government owns a large portion of GM.

I invite you to accuse me of paranoia, but his made me somewhat uneasy. So, I went in search of a solution. I decided that OnStar had to go.
After looking around online, I was able to find out where in my truck the module is located: behind the glove compartment's back-plate. Luckily, from underneath the dash, with my head on the passenger floorboard, I could see the module from below, and I could see where the antenna was plugged into the system. I wiggled my arm in behind the dash, and unscrewed the connector, disconnecting the antenna, and moving the cable off to the side.
(A lot of the truck's electronics run through this module (as if to discourage its removal), but removing the antenna just greatly reduces the signal strength, making the OnStar system always think that is it just out of signal range temporarily, so there are no side effects.)

Then, of course, I had to test it. I cranked up the truck, and tried to activate the OnStar system. I was very gratified to hear "sorry, but I cannot connect right now, please try again."
Now, it is impossible for anyone to track my truck's movements, or remotely disable it. (Which makes me feel a lot better.)

(So, in 98-06 suburbans, avalanches, and silverados (and GMC and Cadillac versions), the OnStar module can easily be disconnected from the antenna by reaching up through the dash from the passenger floorboard. Other GM cars with the system could be disabled the same way, but you'll have to find out where the module is and how to get to it yourself.)

Am I overly paranoid to disable this system, even though I don't use it? Has anybody else here thought about disabling that system? Really, it's surprising how easy it is to do, once you know how.
BigGeek
Well I don't think you are paranoid, but as a mechanic and network engineer I would also tell you that you did not diable the On-Star System, you just made it more difficult for them to connect to it with the antenna unplugged, it's still working:) Can they connect to it with the antenna unplugged? Your guess is as good as mine, but I think what you did was a real smart way to screw with them, if they are using the system for illegal tracking and evesdropping.

Question after you disconnected the onstar antenna did the radio still work, in other words the OnStar system does not use the radio antenna it has it's own? Just asking out of curiosity. I drive older vehicles not equipped for OnStar.

For those of you that think Ocalhoun is being paranoid I got one of my too long stories for you.

My sister works for Lockheed Martin, she has numerous high level clearnces, and is constantly being processed for more of them as they are all through different agencies and site specific. She supports servers and systems for the White House, Seceret Service, Department of Homeland Security, FBI, DoD, and on and on.

She owns and drives a 2000 Caddy Coupe Deville and DOES NOT SUBSCRIBE to OnStar, everytime she is being processed for a new high level clearance her cell phone turns on automatically without her hitting the button, and the GPS comes up. Plus the OnStar system will come on in her car, and stay on for hours, and she is unable to turn it off, it appears to be activated remotely.

Not to mention the fact that she was helping a colleague fix a server problem with 2 servers used by the FBI, and she was in her car talking on her cell phone to him about the problems as she was driving to the site where he was to try and help him correct the issue. she was talking about some very detailed and specific things involved with those servers. At the time she was being investigated for another clearance, and the OnStar system was on in her car the whole time she was headed into downtown Washington DC. The next week during her clearance interview, the investigator told her not to discuss sensitive materials over cell phones in her car, AND LISTED THE EXACT THINGS SHE WAS TALKING TO HER COLLEAGUE ABOUT THE DAY OF THE SERVER CRISIS. She said that she sat there so long with her mouth hanging open that he looked at her, and jokingly told her she can pick her mouth up off the floor now.

Were they listening in on the cell phone, or the OnStar?

I could go on with more examples, but I'll just conclude with how I started, NO I don't think you are paranoid!
ocalhoun
BigGeek wrote:
Well I don't think you are paranoid, but as a mechanic and network engineer I would also tell you that you did not diable the On-Star System, you just made it more difficult for them to connect to it with the antenna unplugged, it's still working:) Can they connect to it with the antenna unplugged? Your guess is as good as mine, but I think what you did was a real smart way to screw with them, if they are using the system for illegal tracking and evesdropping.


Not to sound haughty, but I think my guess might be a little better than yours... Being that I'm an electronics technician. ^.^ I deal with RF signals and antennas (and the electronics behind them) all day at work.
Removing the antenna will cause a huge impedance mismatch, reducing the signal strength by many Db, I'd guess about 30 or so, not to mention how much less efficient the plug is as an antenna: it is the wrong size for the frequency, it's smaller, and is positioned much worse. It could still pick up a signal using the plug as a tiny antenna, but only if the signal is extremely strong; I'd have to be right next to a cell phone tower. (And where I live, cell towers are few and far between.)

The radio and OnStar antennas are separate; they have to be, because the frequencies the two use are very different.
jwellsy
I would look at all the fuse boxes and search/pull all fuses that say something like VCIM Vehicle Communications Interface Module.

Big Brother does essentially have unlimited computing power. They could routinely ping all onstar units looking for changes, patterns and profiles.
ocalhoun
jwellsy wrote:
I would look at all the fuse boxes and search/pull all fuses that say something like VCIM Vehicle Communications Interface Module.

The OnStar box is (not coincidentally) intricately connected with many of the other systems of the truck. Completely disabling it would cause many other nice features to stop working, or at least not work to their full potential.
Just unplugging the antenna, though, has no side effects.
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