Please Help!!!!
 

I have a 2000 Grand Prix GTP with 120,000 miles on it.
For the past couple of weeks the ABS light has been coming on, as well as the TCS light. When the ABS light comes on, the steering becomes tight.

I took it to the dealer and they want to charge me $4500 in repairs.
They said these 3 things need to be replaced:

1. Power steering gear
2. Electronic brake control module
3. Brake pressure control valve block assembly

The parts alone cost $3500.

What should I do?