How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Gary Your Own Question
Gary
Gary, GMC Technician
Category: GM
Satisfied Customers: 16105
Experience:  15 years gm master tech/15 years ASE master tech
19513769
Type Your GM Question Here...
Gary is online now
A new question is answered every 9 seconds

How can you tell if your brake booster is bad?

Resolved Question:

How can you tell if your brake booster is bad?
Submitted: 5 years ago.
Category: GM
Expert:  Gary replied 5 years ago.
usually if a brake booster is bad the brake pedal will be rock hard and there is almost no assist to help push the brake pedal down.OR you will hear a big hissing noise or air excaping noise when you push on the brake pedal with the engine running
Gary and 2 other GM Specialists are ready to help you