For most modern cars, they are equipped with hydraulic brake booster rather than the vacuum boosters in the conventional brake systems. They hydraulic brake booster uses hydraulic pressure produced by the vehicle’s power steering pump to the master cylinder when you apply the brake pedal. Remember that brake booster is not part of the routine brake maintenance inspection content, so you need to pay more attention on it. Here are some symptoms indicating your hydraulic brake booster may fail: if there is brake fluid leaking onto the ground; if you find that the brake pedal is hard to press; if the brakes grab unusually; if it takes a lot of effort to stop the vehicle, you need to stop driving and check it immediately. Once you decide to change, we are glad to offer you all GM genuine OEM hydraulic brake booster with a discounted price.