hit the button on dash to activate silent choice but not opening? have power thru the harness but not working ? could the solonoids be bad ?

Is it not opening or closing? The problem I had with mine was that it would be open and it would close itslef while running. The dealer kept saying it was the check valve but never did get it to work right. I just used tie wraps to keep it in the open position. You could have an air leak somewhere.

it's closed and won't open.

Is it an air or electric system?

it's electric it's corsa quick and quiet.

Both solenoids bad at the same time? hmm

Have you tried to flip them manually and see if they stay open? Or if tight? I had a low battery that prevented mine from operating once. Checked the reset button?

Mine would stick from time to time.