Can I get brake Master cylinder replacement instructions?

Tiny
ANONYMOUS
  • MEMBER
  • 2006 GMC ENVOY
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 80,000 MILES
I have an envoy and when you're going down the road the brakes will start to go to the floor they say I need a brake master can you help me please?
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Tuesday, May 5th, 2009 AT 2:50 PM

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Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

If the brake pedal is going to the floor, either you have a leak or the master cylinder is bad. First, here is a link that shows in general how to replace a master cylinder. You can use this as a guide.

https://www.2carpros.com/articles/how-to-replace-a-brake-master-cylinder

Additionally, you will need to bench bleed the new master cylinder prior to installation. Here is a video showing how that is done:

https://youtu.be/WDxvEQrMkBg

If you look at the attachments below, I included the directions and pictures for replacement specific to your vehicle.

I hope this helps. Let me know if you have other questions.

Take care,

Joe

See pics below.
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Friday, April 9th, 2021 AT 9:59 PM

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