Question about 2003 Chevrolet TrailBlazer

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2003 Chevrolet Trailblazer

Professionally rebuilt alternator was put in trailblazer but battery not charging message and battery lite still coming in. battery is only a couple of months old and tests good.

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Check to make sure all wires are connected on alt.

Posted on May 15, 2009


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Reduce Engine light on; battery light on; low charge from charging system; vehicle won't run faster than 30 mph

You may have damaged the ECM with a power surge from shorting out the alternator. Try to reset the CPU program using a code reader and look for fault codes while you are at it

Jan 26, 2014 | 2004 Chevrolet TrailBlazer

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Is the alternator charging the battery, and are there any trouble codes stored in the engine computer ?

Jan 18, 2014 | 2003 Chevrolet TrailBlazer

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What happens when battery light keeps coming on 2003chev trailblazer

Voltage low usually alternator/regulator not working and battery is discharging. Put voltmeter on battery when running should be 13 to 14.8 volt if not replace alternator and 13 is low should be about 13.8. A fully charged battery is 12.6 not 12.5or lower

Jan 08, 2012 | 2003 Chevrolet TrailBlazer

1 Answer

Battery not charging on 2003 chevy trailblazer battery light on dash is on also

could be a problem with the cables ,check they are connected and you have a 12v supply on the big thick cable from the battery to alternator as some vehicles have a fuse in this line and iam not familar with american vehicles sorry ,if you have power then renew the alternator complete unit prefferably with a bosch factory rebuilt unit if available in your area or country

Dec 22, 2011 | 2005 Chevrolet Trailblazer Ext

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I changed out my battery, but now my windows, a/c and radio aren't working.

Its possible that you have activated the THEFT System, in the 2003-Chevrolet-Trailblazer Owners Manual, check the procedure to disarm.

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Jul 19, 2010 | 2003 Chevrolet TrailBlazer

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2003 Chevy Trailblazer wont start

it sounds like your battery is dead charge it and try again if the starter still clicks it means it is sticking get someone to turn the key while you hit the starter body with the handle of a hammer which will free it of

Apr 01, 2010 | 2003 Chevrolet Trailblazer Ext

1 Answer

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Its the alternator for sure. this display light is directly wired to the alternator.

Mar 07, 2009 | 2003 Chevrolet TrailBlazer

1 Answer

Changed belt on 02 trailblazer now it won't start

Belt turns alternator, alternator charges battery.(no belt, no charging) Charge battery with a charger. Though it may start with a jump, the alt is designed to maintain the state of charge in the battery, not to fully charge it . Therefore jumping puts too much demand on alt and can damage it. or will shorten battery life considerably.

Mar 04, 2009 | 2002 Chevrolet TrailBlazer

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New battery and display states battery not charging

have your alternator checked if your battery was weak for a while this would put big strain on your alternator .chances are your alternator is not charging.

Mar 02, 2009 | 2003 Chevrolet TrailBlazer

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