OnStar is a subscription based service offered by General Motors and available on several modern GM vehicles. OnStar offers in-vehicle security, hands free calling, navigation and remote diagnostics using a module located in the trunk of the vehicle. Even when the subscription is not active, OnStar is capable of monitoring your vehicle (though it is unlikely), which some drivers may feel to be an invasion of privacy. If you do not subscribe to OnStar, you may wish to remove the OnStar module from your vehicle, a relatively straightforward task.
Park your vehicle and shut off the engine. Open the trunk and clear out any items.
Grasp the floor "tub cover" panel along the edge and lift it up. Remove the tub cover panel from the trunk.
Remove the cargo net screws that secure the trunk sill plate using a Phillips screwdriver. The sill plate runs along the edge of the trunk opening inside the vehicle where the latch is located. There are four screws, two along the upper side portion of the seal (one on each side) and two in the bottom rear corner of the trunk floor (one on each side).
Grasp the trunk sill plate and lift it up to remove it. Set the sill plate aside. The OnStar module is located behind the right side panel of the trunk.
Remove the remaining two right side cargo net screws with a Phillips screwdriver. One screw is located on the floor near the front of the trunk and one screw is located along the side of the front of the trunk.
Grasp the right side trunk panel and pull it forward then towards the center of the vehicle to release it. Remove it from the trunk. The OnStar module bolts to the side of the trunk, beneath the panel.
Disconnect the three electrical connectors from the bottom side of the OnStar module.
Remove the three bolts securing the module to the trunk using a ratchet. Remove the OnStar module.
Replace the trunk side panel, trunk sill plate and cargo net screws following disassembly instructions in reverse.
