Question about 2004 Chevrolet TrailBlazer

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My brake peddle become more easily depressed,also vehicle does not stop instantly. i know the problem is the brakes, what thou (PADS,ROTOR,SHOES>>>ect)

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The brake pads have become flatter than they should be. make sure you get them replaced to avoid disaster

Posted on Oct 13, 2010


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There is a running pump sound when I put on brakes and sometimes when I don't hit brakes and a grind sound

Shelly, in most cases, these can be cured by replacing your brake pads/shoes. However, you stated that you are hearing a "pump" sound when you depress the brake peddle. So this is telling me that you may have either a vacuum issue, or having an issue with your "Brake Booster". That also runs off a vacuum. A little info for you. ^^ When your engine is running, the entire system is put under a negative vacuum. This controls things like cruise control, and vacuum assisted brakes. Older vehicle did NOT have a vacuum assist, and were called "Manuel Brake" systems. While these were more reliable, the were harder to push the peddle until the brakes worked. As an example, with your car turned off, depress your brake peddle about 3 times and then try to press it as if you were stopping. You will find that the peddle is much harder to press than if the engine were running under the vacuum. The reason I asked that you depress the peddle 3 times, is when the engine is off, you are no longer building pressure, so this pressure is naturally bled off when you use the brakes. If this does not happen, and your brakes are always hard to depress, then for sure your having a problem with your brake booster. I hope this helps, and good luck. ^^


Mar 09, 2016 | Cars & Trucks

2 Answers

Brake peddle goes soft when i start my car

It is a nomral condition, in every vehicle the break paddle is hard to push before you turn the engine on. But, if you turn the engine on the paddle would go soft.

Mar 15, 2015 | Cars & Trucks

2 Answers

Drive vehicle down the road for 20 minutes and come to a stoplight engine stops when you take foot off gas peddle and go to apply brake. To keep vehicle from dying you have to hold the gas peddle down

Have you changed the timing belt? or timing belt guides? How many miles? This does not necessarily have to do with fuel.... Could have to do with air intake or timing as well....

Jun 12, 2012 | 1996 Dodge Ram

1 Answer

How do you tell if a power brake booster is bad on a 1997 ford f150

Usually when the brake booster goes bad, when driving and trying to stop, the pedal is VERY hard to depress and the vehicle will not stop easily so don't drive fast, you will not be able to stop in short distances.

Mar 29, 2012 | 1997 Ford F150 Regular Cab

1 Answer

1999 traiblazer 4Wd - the ABS light illuminates and vibration sensed in the brake peddle accompanied with a gear meshing / grinding noise when the brake is depressed at low vehicle speed (<20mph)....

I would have to guess you know the problem

You have an ABS OBD Malfunction Lamp on

So just as you have in the past on all vehicles,you
check for codes,diagnose that system & repair

Aug 06, 2011 | Chevrolet TrailBlazer Cars & Trucks

1 Answer

1993 chev 1500 extended cab v8 after putting on front pads and one new rotor I had a very soft peddle so I figured it to be a bad master cylinder so it was replaced. I then bled the system in the manor...

That is a vacuum leak from the booster on the inside, For the solution the rotor have minimum thickness and the value cannot be exceeded even by ten percent. How is the rear brakes if they are shoes did you inspect and adjust them.Also front brakes pads brand form different manufaucture perform at different rate. A low end pad you get low end result,(the effects the coeffieciency of friction).Youll need to address that vacuum leak also,A situation like that does and will affect performance of the brake booster,

Apr 25, 2011 | 1998 Chevrolet C1500

1 Answer

I'm having a problem with the front-right brake where it's apparently getting very hot. The whole vehicle just recently had a brake job done, drums in back and discs in front. I ended up having to replace...

the brake is getting hot, because it is dragging, i see you have replaced the brake caliper and master cylinder the only thing left is the brake hose that aitches to the caliper, it must not be releasing the fluid back to the master cylinder.

hear is a way to test the brake system to find out what is causing the drag.

jack up the car and place on jack stands, have someone pump up and hold the brakes, wile you put pressure on the wheels, the instant the brake peddle is released the wheel should turn easily, if it does not open the bleeder if the wheel instantly turns easily then you need to replace the hose if not then replace the caliper.

Jan 25, 2011 | Honda Accord Cars & Trucks

3 Answers

There is an air leak under the dash and it ties in with the brake pedal

It is a defective brake booster. When the internal diaphram of the brake booster develops cracks or pinholes from age, the crankcase vacume pulls air through the defective break booster diaphram from the air intake valve located on the rod connected to the brake peddle. At first the air leak sound my change or even go away when the brake peddle is depressed. But over time the booster diaphram will detierorieate to the point where the air leak sound will be contiuious. This is a problem that should be addressed ASAP as a defective break booster reduces the power assist to the break peddle and may make it difficult to apply enough break pressure to stop in an emergency situation.
Have the brakes checked by a certfied brake shop right away.

Feb 01, 2010 | 1999 Jeep Grand Cherokee

2 Answers

2007 Yukon tail stop lights wont light up

It sounds like the brake switch, that is usually located along the shaft of the brake peddle under the dash, these sometimes are in a bracket for ajustment may not be able to depress switch. Falow starting at peddle go up to dash, you should be able to see it. Hope this helps.

Sep 08, 2009 | 2004 GMC Yukon

1 Answer

Hissing noise comes from my brake peddle when I depress it

Your Brake Master Cylinder is Going Bad. Have this Replaced and that Noise will go away. Please Rate my Response, I need all the Help that I can get! Thanks!

Jan 26, 2009 | 1999 Jeep Grand Cherokee

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