Hello,
Have a 2009 Buick LaCrosse.
Up until now, the automatic locking and unlocking via the key fob worked fine.
It has become, as best I can describe it, "flaky". Sometimes it works, sometimes it takes many presses of the button, sometimes it won't no matter how often I press it.
But the funny thing is that the unlocking of the trunk always works perfectly, as does the horn and lights flashing whenever I press to lock or unlock.
Put in a new fob battery, but still the same.
I think that it may not be the keyring fob transmitter at all, as the car has built in according to the Manual a feature where the doors all lock themselves automatically as soon as the car moves, and that this feature cannot be disabled. This, of course, has nothing to do with the keyring fob. It also has become "flaky" now.
Thought I would like to learn a bit more about how this system is supposed to function before bringing it to dealership.
e.g., is there one logic board that controls everything, or are there separate modules for each function ?
What is the most likely cause of the problem(s) ? Anything I can check out myself fairly easily ?
Any thoughts would be most appreciated.
Thanks, Bob