Question about 2004 Chevrolet TrailBlazer

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How do i reset my battery light on my 2004 trailblazer

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If you have steering wheel controls it is in the odometer section, if not, turn the key on but don't start it, and pump the gas pedal to the floor three times within five seconds and wait, the change oil lamp should start flashing then go out and thats it..

Posted on Oct 14, 2010

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Posted on Jan 02, 2017

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Rear ac blows in my 2004 Chevy trailblazer when vehicle is off. Front ac is off. What could be the problem? Just started after changed coil pack and hooked battery back up.


Turn everything, all switches, off then disconnect both battery cables and leave disconnected for 30 minutes. This resets PCM to defaults. Then reconnect ( + ) first then ( - ).

Feb 25, 2015 | 2004 Chevrolet TrailBlazer

1 Answer

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

1 Answer

How do you reset SES light on 2004 chevy trailblazer


Remove the negitive cable from your battery for 30 seconds.

Jan 03, 2014 | 2004 Chevrolet TrailBlazer

1 Answer

How do I reset the PCM on a 04 chevy trailblazer


I disconnected the battery, removed fuses 10 and 28 adjacent the battery and waited twenty minutes. I then hooked the battery back up reinstalled the fuses and started the vehicle. The battery light went out and the battery not charging message did not come back on. I then went for a test drive. I had a celebratory adult beverage because it worked.

Feb 14, 2013 | 2004 Chevrolet TrailBlazer

1 Answer

My mom has a 2004 chevy trailblazer and her brake lights weren't working she changed the fuse they work now but her directionals aren't working at all now


Did she disconnect the negative terminal from the battery when replacing the fuse? Is it possible she swapped fuses instead of replacing them? One easy thing to try is to disconnect the battery for at least 30 min to allow the PCM (computer) to reset itself.

Sep 21, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

Service engine light came on? How do I reset it?


disconnect the negative battery cable from the battery for 1 hour, then reconnect it. this will clear the code from the computer. if the problem has been fixed then the light will stay off. but if the light returns there is still an issue.

Aug 21, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

Reset 2003 trailblazer service engine light


is this the check engine yellow light?

Sep 28, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

Chevy Trailblazer 2003 ran the battery down now wont idle


try changing the air filter ,i had a problem ,at ilde in drive my trailblazer would stall, changed the air filter now it's not stalling and got my power back ,there is a secondary air pump that i have to change ,
not sure were it is ? still not running perfect but it's running better .and my service light is on too.
i got it put on scope ,it's the pump .
not sure if this helps ,but i'm start to run in to problems too,i have a 2004 trailblazer.
i like to do fix things myself ,i hope i can.it's the cost if you know what i mean.

Dec 17, 2008 | 2004 Chevrolet TrailBlazer

1 Answer

2004 chevy trailblazer bogging out


Po codes are a default, reset the computer by removing the battery cable for 10 mins.

this will reset the comp back to 0's.

Nov 22, 2008 | 2004 Chevrolet TrailBlazer

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