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Roy Belding
Roy Belding, ASE Certified Technician
Category: Buick
Satisfied Customers: 4652
Experience:  Master ASE since 1980
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Buick Lucerne: ; I have a 2006 Buick Lucerne that has

Customer Question

Hi;
I have a 2006 Buick Lucerne that has 4 wheel disc brakes with ABS. We took it to a tire shop to get new front tires and front end alignment. When we got the car back, we noticed that there is a grindind sound when applying the brake in normal dry road conditions at very slow speed. When you are coming to an intersection, slowing down just before coming to a stop the grinding sound starts and you loose brake pedal. This continues until you are at a total stop. This problem happens infrequently (about 3 of 10 stops) This problem has never turned on the ABS light and the computer shows no trouble codes. I took the car to the local chevy dealer and the mechanic told me the left front wheel speed sensor was bad. I replaced the wheel hub assy. and the wire harness with delco OEM parts. The problem went away for one day and started again. Any ideas???
Submitted: 1 year ago.
Category: Buick
Expert:  Roy Belding replied 1 year ago.
good evening my name is ***** ***** I will assistI assume it is a*****? did you replace all the tires??? it sounds like the abs is activating below 5 mph to stopping. if the tires are a different size or have different depth tread, the rolling circumference will be different the abs will react to this. Roy
Customer: replied 1 year ago.
No, it is not***** it has 4 wheel disc brakes. After putting new tires on the rear the problem is still there.
Expert:  Roy Belding replied 1 year ago.
ok, what about the other questions I asked about the size and tread depth??? Roy
Customer: replied 1 year ago.
All tires are new, same brand, same size and same tread depth
Expert:  Roy Belding replied 1 year ago.
ok, so the fronts are new as well. the abs system needs to be monitored to see which wheel is applying before causing the actuation below 5 mph. that will narrow down the area to be checked. Roy
Customer: replied 1 year ago.
How is this done???
Expert:  Roy Belding replied 1 year ago.
with a scan tool that can access the abs system and watch each wheel rotation. Roy
Customer: replied 1 year ago.
OK Thank you.
Expert:  Roy Belding replied 1 year ago.
your welcome. you can see if a parts store will rent you a scan tool so you can monitor this system..
please dont forget to rate me as this is the only way we get paid for our efforts.
Roy