Question 1

Why do brakes need to be replaced in the first place?

Accepted Answer

Friction material on the brake pad contacts the rotors to slow the vehicle. In time, that material wears away and the pads must be replaced. Sometimes the rotors and calipers must also be replaced.

Question 2

What’s the squealing sound I hear when braking?

Accepted Answer

Over time, wear indicators in brake pads may contact the rotors’ surface when braking, resulting in a metallic squealing sound. Vehicles equipped with wear sensors may also provide an alert that minimum brake pad thickness has been reached.

Question 3

What if it’s more of a grinding sound?

Accepted Answer

If all the friction material has been worn away, the metal backing plate of the brake pad will be the material in contact with the rotor during braking. It causes a grinding sound and braking performance is often diminished.

Question 4

Why do the brakes seem to pulsate when stopping?

Accepted Answer

It may be due to worn brake pads, unevenly worn rotors or unevenly worn tires. Have the pulsation diagnosed as soon as possible to avoid the possibility of greater brake system wear or damage.

Question 5

What about vibrations or shaking in the steering wheel?

Accepted Answer

This is more serious than pulsation. If the brakes are very worn or the rotors are unevenly worn, there can be a significant vibration or shaking in the steering wheel when braking. It may mean brake service is needed immediately.

ASIN	B000S2S426
Brand	ACDelco
Customer Reviews	3.9 3.9 out of 5 stars (5)
Date First Available	October 10, 2007
Item Weight	6.06 pounds
Item model number	178-0699
Manufacturer	ACDelco
Manufacturer Part Number	178-0699
OEM Part Number	96534598
Product Dimensions	13.3 x 11.7 x 11.8 inches

ACDelco GM Original Equipment 178-0699 (96534598) Power Brake Booster Assembly

Description

Specifications

Common Questions