glass ball

[mgbgene]

whats the little glass bulb on the dash by the windshield on a 05 yukon do

 

[NathanJax]

It's the sensor for your autoheadlights

 

[Goodinblack]

Mine predicts the future.

Yours must be broken

 

[mgbgene]

Thanks that's what I thought it was.. Had to pull the dash pad and the thing came apart..Just ordered one

 

[Grimes]

I don't like the thing, very odd appearance. I gave mine a push, it sank about a centimeter, no more appearance and it covers the hole with itself. Autolows work just fine. Problem solved.