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Second opinion] 2010 CTS Performance started making a low…

Second opinion] 2010 CTS...

Second opinion] 2010 CTS Performance started making a low hum that is speed-specific. Seems like engine is working harder with higher rpms at speeds over 50 mph. Fuel consumption up a little, too.

Mechanic's Assistant: Will the headlights turn on? Is the battery fully charged?

Yes and yes. No electrical problems at all.

Mechanic's Assistant: Are you fixing your CTS yourself? What have you tried so far?

No. Not familiar with Cadillacs after 1995. Tried to check trans fluid and that's a mystery too.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Car is fine otherwise. Had a new set of Michelins put on a month ago.

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Answered in 12 hours by:
9/15/2017
Eric
Eric, Automotive Repair Shop Manager
Category: Cadillac
Satisfied Customers: 34,926
Experience: 20+ yrs. experience as repair shop manager and technician.
Verified

HI,

I am sorry that you have not been helped yet. I just came online and saw your question

Speed specific humming noise is almost always caused by a fault hub wheel bearing. They need to be checked for play both on the vertical and horizontal axis and the one with play, replaced

Eric
Eric, Automotive Repair Shop Manager
Category: Cadillac
Satisfied Customers: 34,926
Experience: 20+ yrs. experience as repair shop manager and technician.
Verified
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