I have what sounds like the same thing, didn't start until recently though. 2014 with 110,000 kms. Mine sounds like middle of driver side near the top but I can't pinpoint it with the stethoscope. Again it isn't constant like one click per rpm, more random & might do a couple of ticks at a time or just one every few seconds. 2014, 5.3, 4x4, work truck