Question about 2003 Chevrolet Trailblazer Ext

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2003 Trailblazer has no lower brake lights or upper brake strip, the only thing working is the turnsignals, hazards, reverse, and parking lights, fuses are good, bulbs are good, thinking its the brake switch

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If you have no third brake light it most likely the brake light switch.

Posted on Jun 23, 2009

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2 Answers

2004 Chevy Trailblazer brake lights not working. Checked fuses, bulbs and replaced brake switch yet still not working. Now what? Blinkers, reverse lights and hazards working fine.


replaced brake switch ??? If you don't know how to read a wiring diagram an use a volt meter to test electrical circuits ,your better off taking your vehicle to a qualified repair shop .

Mar 09, 2018 | 2004 Chevrolet TrailBlazer

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2004 Trailblazer lower taillights not working upper work fine.


With the condition of the screws you should check to make sure there is a good connection to the lower bulbs for both power and ground.

Dec 02, 2016 | 2004 Chevrolet TrailBlazer

1 Answer

Has vibration when in idle and in drive. Replaced a frame bushings on both sides,and upper and lower motor mounts.


With the parking brake set and transmission in drive accelerate lightly and see if the engine raises up do the same in reverse if the engine moves up an engine or transmission mount is broken

Oct 11, 2014 | 2003 Dodge Neon

1 Answer

2003 chevy trail blazer hazard intermittently turn


Change the switch. These are actually computers. the runs the turnsignal flasher s also.

Aug 31, 2014 | 2003 Chevrolet TrailBlazer

1 Answer

My 2003 TrailBlazer shifter is stuck in park. The truck starts, but cannot get it out of park


check your parking safety switch beacsue sometiem it goes bad and it locks the transmission in park also check the Brake light switch by looking at your brake lights and see if they work when you brake.

Dec 08, 2010 | 2003 Chevrolet Trailblazer Ext

2 Answers

My back break lights are not working the inside lights stay on when car is off car says hazard ligths are on when they are not and when car is off it beeps like you left the keys in the ignition when they...


beeping maybe light on warning instead of key warning. Brake lights go through the hazard and turnsignal switch. Hazards may not be flashing due to bad flasher, but may be turned on. Most likely possibility is hazard switch contact in combination switch (hazard and turnsignal switch in one unit). Unplug the turnsignal switch at the bottom of the steering column and see if the problems go away, and you will know if that is it.

Jan 16, 2010 | 1995 Buick Riviera

1 Answer

2003 trailblazer loss of cruise control and ac fan


for parking brake and abs check for parking brake switch operation, for abs check with scan tool for any trouble code, for your cruise control unit check for any broken vacumm hoses on the engine, for the ac fan, check the fan motor, relay or fuse.

Jul 16, 2009 | 2003 Chevrolet TrailBlazer

1 Answer

No brake lights


Took my Trailblazer to dealership. They replaced both rear tail light socket boards (these are plastic parts that house all of the rear lamps/bulbs and attach to tail light housing) They advised the sockets in the boards have a tendency to go bad. Everything works just fine. Cost of each part was approximately $29.00. Easy to replace yourself and save the labor.

Apr 28, 2009 | 2003 Chevrolet Trailblazer Ext

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