I can hear intermittent clicking from behind the radio/climate control module. Clicking is there with climate control on or off. Are there any relays hidden back there. Only relays I can find are under hood/back seat.

So, jumper pin 12 and 13 together should give me the needed 12 for the dimmer. Ground is common I take it.

OK, I was at the local pick your own part place, found an auto day night mirror like mine w/ the On Star Buttons. I've seen the tags here for the normal "non-onstar" models 7 pin connector. Looks like mine has a 14 pin connector. OK, which terminals do I need to jumper to provide the 12 vDC to the ...

Local GM dealer did mine, and yes I have the clunk