The PCB you are removing is what we call a NAD board, short for Network Access Device.
Think of it as a modem with a GPS chipset on it, while the other board is the computer.
Removing it will not trigger any CEL, but it will record a DTC within the OnStar module.
Quote:
Originally Posted by cellsafemode
The OnStar module is made by lg, but the give away is it will have the imei number displayed which tells us it has a cell radio in it.
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Correct. LG is the supplier for these modules and Verizon network is used for CDMA connection.
I understand why some will want this off of their vehicle.
You'd be surprised what this module is capable of.