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2000 GMC Safari Brake pulsates

Tiny
PETE92350
  • MEMBER
  • 2000 GMC SAFARI
  • 120,000 MILES
When pressing on the brake pedal in the stop position with engine on, the brake pedal would pulsate/vibrate. What is the cause for the brake pedal to pulsate, I have already changed the brake booster n brake master cylinder?
Friday, July 5th, 2013 AT 4:44 AM

2 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Are you referring to a real rapid pulsation, almost like a buzz as the pedal also drops lower when coming to a stop?
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Friday, July 5th, 2013 AT 5:20 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Also, does this have a vacuum booster or hydro-boost?
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Friday, July 5th, 2013 AT 5:25 AM

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