I'm experiencing an issue whereby the lighting behind the gauges on the cluster isnt working when I turn the lights on. The digital displays are working fine (i.e. mileage readout and radio) and the steering wheel control buttons illuminate orange just fine. The LCM itself lights up to show the different light positions as do the hazard light and door lock button, however the stereo buttons and climate control buttons do not light up orange.
I have run the Test 2.0 on the cluster and everything works other than the dials themselves lighting up.
I have disconnected the battery overnight and reconnected - still same issue.
I have checked all the fuses and they all look fine too (there are 3 fuses I think can't remember the numbers off hand)
I have run out of ideas on this and have searched and searched for answers, some posts suggest LCM others suggest GM5 however I dont believe I have the most common symptoms for failure on either of these - I'm happy to be wrong about that - just desperately need to know whats wrong so I can get it fixed.
Any help advice or guidance would be most appreciated