Question about 2003 Chevrolet TrailBlazer

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What could possibly be wrong when my 2003 chevy trailblazer vibrates sitting still in drive with my foot on the brake? . Have already replaced the left motor mount, the fan clutch and the water pump. smoothes out a little when you put transmission in neutral while sitting with foot on brake. mechanic says there is no problem with tuning of engine.

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Check the harmonic balancer

Posted on Oct 08, 2010

  • Freddy Oct 29, 2010

    Is the Check Engine light on, if so, what fault codes are set? If there is a significant vibration, there should be a fault set. You may have a misfire caused by a bad plug or coil, bad injector.

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I agree i had the same issue sounds like motor mount to me

Posted on Nov 30, 2012

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Never just replace 1 motor mount, while they may look ok by sight, the old ones aren't the correct height, they are crushed. Also, don't buy aftermarket, they **** and you'll end up with the same problem sooner than later. The only other thing I've seen is transmission mounts.

Posted on Feb 11, 2012

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Sound like bad motor mounts

Posted on Feb 10, 2011

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Any ideas why a 2003 chevy trailblazer may vibrate in the front but stops when you turn left


Does the vehicle make any noises while driving? If there is a "growling or roaring " noise associated with the vibration, check the right front hub bearing. If there are no noises and only vibration, check the right front upper ball joint and control arm bushings. The Trailblazer's upper ball joint and control arm bushings become worn and cause the tire and wheel assembly to shimmy while driving. The vibration stops when turning left because of weight transfer to the right side which keeps the wheel steady for a moment. Also, check the tire for irregular wear.

Mar 05, 2015 | 2003 Chevrolet TrailBlazer

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2003 Chevy Trailblazer brake pedal not releasing. When turning and brakes tapped briefly they continue to brake until complete stop. When stopped and foot off brake 10 sec delay before pedal releases


Sounds like your ABS unit on its way out.
with the engine off, pump the pedal till its hard. keep your foot on the pedal pushed down and start the engine. your pedal should become light and continue down to the "floor".

Jan 12, 2015 | 2003 Chevrolet TrailBlazer

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Stuck brake switch, located under dash, brake pedal arm sits up against it, might need adjusted or replaced, check the connector.

Dec 05, 2013 | 2003 Chevrolet Chevrolet TrailBlazer

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I have an 02 Chevy Trailblazer and I'm having a


It sounds like your brake powerbooster is going out. If it has a vacuum leak or a seal that is bad it will loose the boost part of the brakes and basically comes to manual braking. It sounds as if the seal behind the diaphram, the side closest to the driver is bad allowing the vacuum from the engine to basically put the brakes on. Good luck and let me know.

Jul 08, 2011 | 2002 Chevrolet TrailBlazer

2 Answers

When my foot is on the brake my 2002 Chevy Trailblazer is vibrating what could be wrong?


when you say its vibrating is this only when your stopping or sitting still? if its when you go to stop it may be warped rotors. if it shakes only when your sitting still you may have a vacuum leak at or near the brake booster. have some one step on the brake pedal while you are under the hood to see if you hear a whooshing noise. if you hear sucking air find and repair the problem. hope this helps

Feb 02, 2011 | Chevrolet TrailBlazer Cars & Trucks

1 Answer

2003 trailblazer has bad vibration when in gear and brake pressed


you need to check to see if the rotors are bad and the brake pads need to be replace also checkout the upper and lower ball joints as well and the sway bar bushing are bad or you could have a bad tire also like to give you this information as well if you every have any hard to find GM-parts its Schram auto & truck parts 1-800-292-1092 and they website is www.schramauto.com wish you the best of luck Michigan Man.

Dec 28, 2009 | 2003 Chevrolet Trailblazer Ext

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