hoping someone with search skills can help me find what I'm looking for. I'm limited to my phone for internet for awhile and could use help as my google search sux.

the lumbar in my c5 seats no longer works. I push the buttons and hear the little motor, but nothing inflates. Not sure if this requires replacing all the bladders or if it could just be a line come loose.

I was going to check the lines for lumbar but not sure how to remove the center seatback section or what I should look for troubleshooting.

any advice is appreciated.