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Ask MPMoore Your Own Question
Category: Buick
Satisfied Customers: 2956
Experience:  GM world class, ASE master tech w/ L1 advanced driveablity, 15yrs experance bumper to bumper
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it mean when my car makes a groaning noise when I turn a corner?

Resolved Question:

what does it mean when my car makes a groaning noise when I turn a corner? It doesn't do it all the time but frequently enough.
Submitted: 5 years ago.
Category: Buick
Expert:  MPMoore replied 5 years ago.

Its unlikely the a/c is causing this issue. It would not make a noise because the truck is turning. The problem you have is most likely the ABS cycling on because you are getting a bad signal from a bad wire harness at one of the front wheel speed sensors. What happens is the speed sensor drops out when turning because the wire harness going to the sensor moves when the front wheels turn and causes the speed sensor to drop out. The ABS computer sees this as a wheel that has stopped so it thinks the wheel has locked and cycles the ABS motor on. This will cause the brake pedal to vibrate or you will hear a short grinding type noise from the front end of the truck.

You need to have them check for any abs codes or check the wheel speed data when turning the truck at parking lot speeds. This is when this problem is most likely to happen, the speed sensor that drops out needs to be repaired. I normally replace the wheel hub and the harness at this hub. Your local dealership will stock the replacement harness. This replacement harness is not the complete harness but its a new connector to the sensor with about 2 feet of new wire that has to be spliced in to the old harness.

Let me know if you have any more questions on this issue.

Customer: replied 5 years ago.

I have not noticed the brake pedal shaking, and it is not really a grinding noise it is more of a moan.



Expert:  MPMoore replied 5 years ago.
To check to see if it is the ABS making the noise, you can remove the ABS fuse and drive the truck. You will loose ABS braking but the normal brakes will work and you will not have nay problems. The fuse is located in the under hood fuse block and is a large mega fuse. Its labeled as ABS MTR and is fuse number 36. Remove this fuse and test drive the truck to see if the noise is still there. Your ABS lights will stay on in the dash but when you replace the fuse they will go out. If the noise is gone, then its the ABS, if its still there then its another problem.
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