2001 Impala LED conversion

I can buy a 50 pack of while T10 LEDs. I know that every bulb is a T10. The Reverse lights are T10 the tail lights are T10 the truck, floor and lights above the rear doors are all T10. License Plate lights are also T10 My question is what are the bulbs in the Onstar Mirror? Are they T10? how do i get to them? Are the bulbs in the gauge cluster T10? what about the Climate control, Shifter light and stereo?

You cannot change the bulbs in the onstar mirror as well as your radio. Small "wheat" bulbs.

You cannot change the bulbs in the onstar mirror as well as your radio. Small "wheat" bulbs.

what if the mirror lights burn out?