Is the service department open on Saturdays?

Yes

I had problems with the service department. After my last oil change a leak formed in my power steering. I took it to them to check out and they said they would have to charge me money to fix it. The next day I got a phone call from a person at the dealership offering to buy my car and asking me to bring it in to be appraised. The problem with my power steering is someone put the wrong type of power steering fluid in it and I see evidence of them draining the right power steering out of the reservoir. When you have the wrong power steering fluid it will leak. I put the right kind of did now it's not leaking anymore a little suspicious I would say