Question about 1998 GMC Yukon
My 1998 gmc Yukon is having issues with the brake booster I think there is air in it im not really sure what I have to do to replace it step by step without causing any other problems
Can you provide me with additional information? Such as, does the brake pedal go to the floor when applying the brakes, are the brakes spongy, non responsive? Is there anything leading up to this issue, such as a minor accident?
Posted on Apr 18, 2014
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Posted on Jan 02, 2017
SOURCE: service brake booster display
Your brake booster is the heart of your power brakes. It runs off a vacuum from the intake to booster. Your brakes will still work as long as they have fluid. They'll just get stiff. It probably means you need a new one
Posted on Mar 31, 2009
Yes , for sure. A haynes manual is a must have for anyone who wants to do work on their own car. It will save you hours of frustration and unnecessary work. WELL worth the cost.
When you say the booster is going out , are you sure ?
They work of a vacumme hose from the engine , if that hose is leaking , or the little valve where it goes into the booster is no good , than you might think the booster is bad when it is good.
In general terms either the booster is good , or it is bad and you have to stand on the pedal to get any brakes.
If you post more info about what your brakes are doing , or not doing , someone might give you a different solution / diagnosis.
Posted on Jun 02, 2010
its advisable to disable the air bag system and disconnect neg term at battery-remove vacuum line from booster pull straight out of grommet remove master and move aside without removing or bending lines -remove left side under-dash panel and the heater duct under steering column remove the pushrod retaining clip and slid the brake light switch and pushrod off the pin -remove the 4 nuts slide booster and gasket out from firewall
Posted on Jul 26, 2010
Hi just sounds like the mounting or brake light switch is not hooked or adjusted right.its a very easy Fix.Get a Helper to watch the rear lights while your adjusting.If does'nt work after adjusting or reconnecting it .Go get another Switch,Something sounds Damaged.
Posted on Oct 04, 2010
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