Humming noise while driving


Asked by Jan 30, 2016 at 12:29 PM about the 2008 Cadillac CTS 3.6L DI AWD

Question type: Maintenance & Repair

While I'm driving their is a humming noise.. Was told it could be my fuel pump, but gas is flowing fine. I haven't had my AWD drive transfer case fluid drained and replaced, could it be that?

2 Answers


Tire noise is a common cause of hum. I doubt it is the fuel pump.


I had the same issue on my 07 cts when the rear wheel hub assemblies go they make the oddest hum so annoying. One of mine went at around 70000. I replaced both rear wheel hub assemblies right away since if one goes the other side is not far behind. Use moog or timken if you dont want to replace them again. I have 118000 now and still driving smoothly.

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