I have 06 2500 auto, and yesterday I noticed that one of my relays is very noisy. I don’t know if it is normal and I did not notice it before, or did something happen. If one of you with 06 could do me a favor and check his truck, I would appreciate it. Here is how:
Truck started and auto transmission in park, press the brake pedal on and off, and listen for relay clicking somewhere in the cluster. In my truck you can definitely hear loud click / click. Just thinking about it, it also might be release mechanism for transmission shift from Park.
Thanks in advance.

 

Should be the tranny shifter release.

 

but can you hear it engaging?