I have a 2001 Impala.
It runs perfectly fine, until the temperature reaches about 25 degrees Celsius.
Then the ticking happens. There was a ticking on the passenger side, which would cause my cabin lights to flicker. But I figured out that it was the battery relay in the panel.
But there is still a ticking and if feels like it is coming out of the steering column. I can feel it in my steering wheel when i have my hands on it.
That ticking causes my radio to not work. a message shows up saying cal error and then locked. Also, my running lights flicker unless i turn my headlights on, then it stops and when i am driving there is a loud tick unless i put my foot on the break. And the biggest problem this causes is that my fan to cool my engine stops working, and i need to drive at least 60 km/h to keep if from overheating. If i am stuck in traffic on a hot summer day my car will over heat.

I hope someone knows how to solve this problem !!

 

First thing I would do is check battery , and every ground you can find .
I've have weird problems caused by that and the BCM as well .