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2005 GMC Yukon SLE 4dr 1500

2005 GMC Yukon
Trim Info:
Rear Wheel Drive, 4 Door
16 mpg city / 20 mpg hwy
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September 11, 2012, 10:57 am

Stephanie H

Question: Master Cylinder?

I just want some feedback before I start buying parts.

I was driving to my daughter's bus stop this morning (it's down a very steep hill) I had to stop on the hill and when i went to go again my car was stopped, wouldn't roll at all and the brake petal was stuck to the floor. I tried prying it up with my foot (no go) and finally got it unstuck when I put it in reverse and pressed on the gas. I could hear the vacuum booster hiss a little bit. I'm really hoping that, that is not the issue..... I replaced the booster 13 months ago.

I'm thinking that it is the master cylinder, it's relatively inexpensive and it looks easy to replace. But, I don't want to spend $65 and have it be the booster.....

Thanks in advance!!

September 15, 2012, 9:21 pm

Ron W
Expert Mechanic

I think your master cylinder push rod may be maladjusted. When you replace the master, did you adjust it? A brake pedal stuck on that can't be pulled back up is a very uncommon fault.

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