Question about 2004 Chevrolet TrailBlazer

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What happens if i disconnect the battery from my 2004 chevy trailblazer?

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Nothing will happen but while reconnecting battery you may have to enter your stereo code that comes with car manual and keep keys with you don't keep it inside cause car can get lock automatically, so keep keys in your pocket. if any issue please let me know. thanks.
Yogesh

Posted on Nov 15, 2010

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I disconnected my battery to my 2004 chevy trailblazer to chage the oil when I hook the battery back up it try starting it's self


And why would you have needed to do that .I have changed oil for 50 years and never had to disconnect the battery one time

Dec 26, 2015 | Cars & Trucks

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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

2004 chevy trailblazer brake and abs light stays


on my old 1996 blazer.. the little wire coming from the battery +
positive terminal goes to the ABS.
...this needs to be attached properly.
with some snowPlow setups. its a good idea to disconnect the ABS...so the truck will Stop.
....proper bleeding of the ABS brake circuit may be needed.
..best idea.........see GM dealer.

Oct 19, 2014 | 2004 Chevrolet TrailBlazer

1 Answer

2004 chevy trailblazer idles up and down when heater is turned on


Not just the heater, but the defroster only. Turning the AC on will do the same thing. You need to clean your throttle body with the battery disconnected to fix this problem.

Oct 01, 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

2004 chevy Trailblazer, We changed the battery and now the a/c only blows hot air, How can this be fixed?


Try to reinitialize the HVAC system by turning all controls to their off position or fully CCW position, then disconnect the battery for a few minutes. Reconnect battery and allow the HVAC to initialize, don't move any controls for at least a minute. If this does not work, you probably have a stuck blend door or a bad door actuator.

Mar 23, 2011 | 2004 Chevrolet TrailBlazer

2 Answers

2004 chevy trailblazer ext. Clicking noise coming from right rear panel in car at start up. It clicks like 8 times and stops, then 8 times and stops. It will do this several times then stop completely....


Did you recently replace or disconnect the battery? Common problem is for the airflow actuators to go out and make that clicking sound in the rear when the battery is changed or disconnected.

Jan 14, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

My chevy Trailblazer is stuck RUNNING,My ignition wont turn off?


Try to move the steering wheel back and forth. If that don,t work try to disconnect the neg - side of the battery. this will at least kill the engine.

Mar 01, 2009 | 2004 Chevrolet TrailBlazer

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