Question about 2006 Chevrolet Trailblazer

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2003 chevy trailblazer ecm not reading scan tool and check engine light is on

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Your underhood fuse block contains a fuse for the cigar lighter. this also powers the scan tool make sure it is not blown. chk pin 5 at data link connector for good ground pin 2 for power

Posted on Nov 15, 2009

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Posted on Jan 02, 2017

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Dec 10, 2012 - Tech Tip: Reduced Engine Power Message Displayed on GM Vehicles ... Model year 2008-'10 vehicles must have the engine control module (ECM) reprogrammed ... Do not drop the electronic throttle control components.

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Dec 23, 2011 - 2003 Chevy Trailblazer-CHECK ENGINE LIGHT AND REDUCEDENGINE POWER ... The reduced engine power ligth comes on and I lose power. ...Next, the fan clutch failed -- which is when he did an "above and beyond" .... yesterday I have not replaced anything bc they have told me nothing is wrong.

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1 Answer

2003 chevy trailblazer service engine soon light


If the service engine soon light is flashing, it means the computer has detected an engine misfire with the potential of catalytic convertor failure. Don't just tune it up. Bring it somewhere they can read the trouble code. Sometimes it will designate which cylinder is having the problem.

Sep 24, 2014 | 2003 Chevrolet TrailBlazer

1 Answer

How can I fix the code u100 that my chevy trailblazer is throwing?


Possible causes
- Faulty Engine Control Module (ECM)
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Read more: http://engine-codes.com/u0100_chevrolet.html#ixzz3BpsbZ5mr

Aug 29, 2014 | 2002 Chevrolet TrailBlazer

2 Answers

What has to be done to turn off sevice engine soon light ? THIS IS ON A 2003 CHEVY TRAILBLAZER.


You can buy a hand scan tool and turn it off. If you can't get a scan tool, you can remove one of the battery cables and wait for 10 mins before hooking it back up. But keep in mind that you need to reset the radio and clock

Jul 25, 2010 | 2003 Chevrolet TrailBlazer

1 Answer

I have a 2002 Chevy Trailblazer LTZ, Just 110,000 never had a problem yet. Recently service engine light came on and now when i go to accelerate, their is almost like an idling sound before changes gears....


Your ECM has an error code locked in, when there is an error with the Fuel delivery system/ Exhaust system or any related sensors the ECM runs in a lag mode....Transmissions shift harder and slower (its an electric transmition) it may take longer to accellerate up to speed....My advice would be to go to AutoZone Napa or AAP (which ever is in your neck of the wood) and have them scan your ECM with their scan tool.... This will tell you where to start as far as troubleshooting. Also they can clear your check engine light.....this will make your truck run normal again (until the light trips) Hope this helps

Oct 02, 2009 | 2002 Chevrolet TrailBlazer

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

Chevy trailblazer - brake lights do not work


try checking the brake light switch attached to the brake pedal,very common problem. has about 5 contacts in it ,they all operate different things. If you have a scan tool with live data readings you can watch them all. also check fuses and bulbs ,but you say the signals work so that seems ok.

May 04, 2009 | 2003 Chevrolet TrailBlazer

2 Answers

03 chevy trailblazer reset engine light


the check engine? you need to have it scanned and the codes cleared at an autoshop. it will just pop back on if the problem isnt taken care of.

Oct 10, 2008 | 2003 Chevrolet Trailblazer Ext

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