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I just tried to install the OBD reader for the Verizon Hum program. I advise against it. My vehicle is undrivable while the Hum Reader is installed. Upon plugging in the OBD reader and starting the car, I received a reduced propulsion error message and engine not available message. All error lights also lit up my display. I immediately, tried the turn the vehicle off and it would not completely shut down. It would return to the initializing start up screen and try to start back up only to have the error messages return. I unplugged the OBD reader and was able to get the vehicle to shut down. Upon starting the vehicle back up (with the reader removed), all of the error codes persisted (I couldn't shift out of park) until I cleared them with a code reader. After clearing the codes, I still couldn't shift out of park so I turned the car off and restarted it allowing it to initialize again and it is back to normal operation. All told, this mishap took 2 hours to fully resolve and get my car back to normal operation.
 

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The right side OBD or the left one ?
 

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I don't see the point as it doesn't appear to do anything that OneStar does not already do...
 

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I plugged in SyncUP from T-mobile which offers some of the same services that the Verizon version does. It didn't cause any issues with the Volt or my Ford Focus Electric. However, my monthly Onstar e-mails state that Onstar couldn't get the diagnostic info due to device plugged into the port.

I like the device because it offers wifi up to 5 devices in the car. Cheaper tablets are wifi only, so helpful there as well as using it instead of my phone's data plan gives me more data each month. $150, but free with 2 year data line usage.

I hope you just got a bad unit, but if not.. wow!!
 
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Hi everyone,

We just wanted to take a moment to check in with the Volt community about third party devices. As a reminder, the installation of non-GM parts will void warranty coverage for components that are affected by the installation of these non-GM parts or devices.

If you have any questions on this, please don't hesitate to send us a private message.

Kindly,
Lauren E.
Chevrolet Customer Care
 

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Many OBD devices cause issues. Don't use them while driving unless you're sure they're compatible.
Most poll way too much information and flood the network so the vehicle systems can't communicate to do their jobs.
 
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