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EricFromCT, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 3953
Experience:  ASE Master certified L1, L2, Diesel Certified 16 years experience
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I have a 2007 DTS that was making a power steering pump

Customer Question

I have a 2007 DTS that was making a power steering pump wineing noise so I replaced the pump with a new one. The brand new pump wined the same as the old one instantly. I never had any loss of steering. Now a month later I am losing steering. The wining never stopped.
JA: When was the fluid last checked? Have you heard any whining noises while turning the wheel?
Customer: I kept it full of fluid. Noise seemed while turning wheel and with engine rev. When I checked it yesterday it was a little low and seemed there was a little pressure in the system
JA: Are you fixing your DTS yourself? What have you tried so far?
Customer: Yes .Just replaced the pump with a new one a month age
JA: Anything else you want the mechanic to know before I connect you?
Customer: No
Submitted: 9 months ago.
Category: Cadillac
Expert:  EricFromCT replied 9 months ago.

Hi. Have you checked for the source of the leak? The steering gear is known for leaking and causing lack of assist.

Customer: replied 9 months ago.
Possably . I will check but why was a brand new pump full of fluid still wining
Expert:  EricFromCT replied 9 months ago.

If the steering gear is not allowing the fluid to flow through it correctly the pump will whine when too much back pressure exists.

Expert:  EricFromCT replied 9 months ago.

Thank you for viewing my response and letting me help. If you have any more questions let me know. Also please take the time to rate my assistance.