Cadillac Repair: service ride control, speed button, control thanks

Question
Im thinking about buying a 92 seville,,4.9 L,,150,000 miles. I drove it the other day and the front end seems to be real 'bouncy', the steering is tight just seems like the struts may be worn out,,,im new to struts like this so I dont know, its a friend of mines car so I wanna make sure it doesnt cost to much to fix before I buy,,the sevice ride control is lit up on dash and i got these codes,,E052, E091, I039, IO52, R033, R061,also how do i erase the codes,,I read somewhere to prees 'off' and 'high' but I dont have a 'high' on the control,,,thanks  

Answer
1. Ignition ON. Engine OFF.

2. Simultaneously push and hold the off and warmer buttons for 3 seconds and release them.

3. After all the codes display you will see ECM? or PCM?

4. push and release the HI (fan speed ^ button) and you will see DATA

5. Keep pushing and releasing the LO (fan speed (v) button) until you see CLEAR CODES?

6. Push and release the HI (fan speed ^ button) and you will see CODES CLEAR.

7. Wait 3 seconds and turn OFF the ignition.

8. Re-enter diagnostics and see what codes return.