Question about 1996 Chevrolet Blazer

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Bad brake booster

Need to change a brake booster on a 1996 chevy blazer

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  • Anonymous Mar 13, 2009

    brake pedal gets hard and make a whining noise when pushed.

  • John Jon May 11, 2010

    why is your brake peddal hard as rock?

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  • Chevrolet Master
  • 6,982 Answers

If you know for sure that the booster has failed, you need to unbolt the master cylinder from it, (sometimes you can move it away enough to not even disconnect lines.) Then unbolt the booster from the firewall, disconnect the pedal linkage if connected to booster. Remove & replace booster assembly and everything else you you took off. If you didn't have to remove master cyl you are done. If removed, bleed master before putting back into service!

Posted on Jan 09, 2009

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Not sure I am following your question, or maybe questions.
If you can not shift out of park with the key on, the brake switch on the pedal may be faulty or out of adjustment.
If the warning light is on, it could be the fluid level sensor in the master cylinder, or the parking brake switch.
If you have no brakes after you try bleeding the master cylinder, the rod inside the booster may not be connected correctly. If you replaced the master cylinder along with the booster, you would need to bench bleed the master before installing it in the truck.

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You should check your vacuum lines make sure they are all connected plus the line you keep disconnecting is collasping onto its self which in turn will make the brakes stick so you must have one of the ends plugged.

Jul 25, 2012 | 1996 Chevrolet Blazer

2 Answers

How do i change a brake booster


from autozone.com:

  1. Disconnect the negative battery cable.
  2. Apply the parking brake.
  3. Unplug all necessary electrical connections.
  4. Remove the master cylinder from the booster and pull it off the studs, CAREFULLY! It is not necessary to disconnect the brake lines.
  5. Disconnect the vacuum hose from the check valve.
  6. If necessary, remove the brake light switch.
  7. Disconnect the booster pushrod at the brake pedal.
  8. Remove the booster mounting nuts, located on the inside of the firewall.

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Fig. Fig. 1: Vacuum booster mounting

  1. Lift off the booster and remove the gasket.

To install:
  1. Install the booster with a new gasket.
  2. Tighten the booster mounting nuts to 21 ft. lbs. (29 Nm) on all except 1996-98 models. On 1996-98 models, tighten the nuts to 26 ft. lbs. (36 Nm).
  3. Install all remaining components.

Oct 29, 2010 | 1998 Chevrolet Blazer

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Brake booster replacement for 96 s10 blazer


tow lines off master cylinder detach the power brake booster from the firewall remove four nuts uper right nut hard to get to

Oct 15, 2009 | 1996 Chevrolet Blazer

1 Answer

I have excessive brake travel, and a hard time 98 chevy blazer


Two issues...
The brake booster has a ruptured diaphragm. Replace the booster.
It is located under the hood between the brake master cylinder and the firewall.

Your master cylinder may be leaking fluid internally past the plunger.
Have it examined when you change the booster.

Oct 12, 2009 | 1998 Chevrolet Blazer

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