It would appear you paid for their technician's education. I would ask the Service Manager to refund every part of the invoice that wasn't responsible for the problem.
There is no bladder in the folding top system. The only bladders in the car are pneumatic and they reside in the seats for the adjustable lower lumbar support.
The MSRP for the hydraulic pump motor has dropped from more than $1680 to $1355. The discount price (online retailers, and what the dealer pays) runs about $1200; it used to be around $850, so the savings gap has narrowed considerably on these components. Look at the invoice to determine if you were overcharged for this part.
Make sure an O-Ring kit was installed. If it wasn't, take the car back and have them do it right. Anytime the hydraulic lines to the pump are disconnected, new O-Rings are required to be installed. The kit is cheap. A leak later on probably won't be.
The pump replacement labor can get a little pricey, but replacement shouldn't take over four hours. If the tech has never done it, it could take all day. (Another reason you save money with a certified XLR technician.) Call your local Cadillac dealerships and speak to the Service Manager and inquire if they have Certified XLR techs who have completed the specific XLR training. (All GM techs are certified is the usual answer when you speak to a Service Writer. It's not the same thing.)
Starting a new thread is easy; just press the "Start a New Thread" button at the top/left of the page when all the threads for a section are displayed. This keeps your thread easy to find rather than embedded in another thread, and helps other members learn what fixed a particular problem. Just make the thread title something relevant, (TOP RETRACTS AND BURSTS INTO FLAME) so it pops up during a search query; it's really helpful.
Read all the technical posts, (and there are quite a few now) you don't need to memorize them, just be familiar with the thread titles so you can refer to them later if a similar problem affects your car. A lot of us learned the hard way, and these lessons are waiting in there for you to learn (and save money) from.
CC
