Hi,

I just purchased a 2005 Chevy Cobalt and I have two questions:
1. When I turn on the car, all doors lock, which is fine. When I turn off the car, all doors unlock. However, the car apparently does not have remote keyless entry AND there is no power lock button inside the car AND all the doors do not lock when I use the key to lock the doors. This means, that I have to manually lock all doors whenever I park the car which is quite inconvenient. Is there any way to fix this?
2. What is the small antenna under the rear view mirror that bears the name "XR Plus"?

Thank you very much.
Best regards

 

there is probably an aftermarket remote start or keyless entry module in the car along with aftermarket door lock actuators. Have a look under the dash or a module zip-tied somewhere it doesn't belong

 

Thank you for your reply. I will try to look for a solution.

-D