Question about 2005 Chevrolet Cobalt

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Car alarm on 2005 chevrolet cobalt

When opening car door the alarm rings until you strat the car .and i use the keyless alarm to open the door. I just brought this car for my duaghter and don't know if I should take it back because of the key alarm is not working right,and I put a new battery in the key alarm. I was told thats how the alarm works.

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That is incorrect the alarm is jsut like any other it should only sound if there is a problem, which in this case there is, whoever you bought the car from is lying to you, i would have to say that the contrl module for passive alarm is bad

Posted on Apr 20, 2009

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I have a 2005 cobolt my alarm goes off every time I open the doors my keyless remotes do not work I replaced the battery and they still don't work can anyone help me

Posted on Nov 22, 2014

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The Driver Information Center menu allows you reprogram the security system. Your owner's manual has step-by-step directions to access the system.

Posted on Jul 22, 2009

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2 Answers

I have a 2005 cobalt every time I open the doors the alarm goes off I replaced the battery in keyless entry but they do not work can anyone help?


You may have accidentally broke the controller. They are fragile. The newer cars like yours automatically set the alarm when the doors are locked from keychain remote, or locking manually. New remote, $50-100.

Jan 03, 2015 | 2005 Chevrolet Cobalt

1 Answer

Car alarm goes off when door is open


Alarm reset has been set to sensitive or a faulty unit in either case have an auto electrician have a look at it to diagnose any problems that maybe going on.

Hope this helps

Aug 21, 2012 | 2006 Chevrolet Cobalt LS

1 Answer

Not sure what is going on with the car. My daughter arrived at her car attempted to use the keyless entry but nothing happend. She used her key to open the door and attempted to start the car. The car...


That's what happened to me when my battery died I opened the door with the key and tried to jump it and the Alarm goes off. then i put a new battery in the car and the problem was solved. Good luck

Dec 13, 2010 | 2007 Chevrolet Cobalt Coupe

1 Answer

I own a 2005 Jeep Grand Cherokee Laredo 4.7L V8. My keyless entry is broken so I have to manually open the locked driver's door. When I do this, the car alarm goes off until I start the engine. I am...


PLESE DONT EVEN TRY.it aint that simple,the computer tells the engine that you have the right key but as you dont have remote locking anymore it thinks your trying to STEAL it.you NEED to replace the remote fob.(you call it keyless entry)think of it this way if it were that simple why fit an alarm system in the first place....(someone asked if you could take out a fuse to stop the alarm !!!!!.)

Oct 13, 2010 | 2005 Jeep Grand Cherokee

1 Answer

The car alarm goes off every time I open the door. I changed the battery in the remote car door opener but it never worked. What can I do?


because of the variations in remotes fitted, i can only suggest you reset the alarm for you particular alarm system.

Aug 25, 2010 | 2006 Chevrolet Cobalt

2 Answers

How do you replace the battery for a 2007 cobalt keyless remote? I can't unlock the doors or start the car. Battery is dead.


use a little flat head screwdriver and pry the key fob apart and you will find the battery inside.

Feb 10, 2010 | 2009 Chevrolet Cobalt

1 Answer

Alarm goes off everytime I open the door.


Sounds like the anti theft system needs to be fixed. Contact your local dealer.

Jul 13, 2009 | 2005 Chevrolet Cobalt

1 Answer

Ok i have a question. I have a 05' Cobalt LS and sometimes its like the door locks get jammed or something. Sometimes the unlock button wont fully unlock it the unlock thing will pop up but door wont open!...


sounds like you need to replaced the latch in the door. or like my 06 cobalt lt the door was bouncing and not closing all the way, or not opening. they cleaned my latch and i havent had a problem since, but that latch in the door could be your problem.

Apr 16, 2009 | 2005 Chevrolet Cobalt

6 Answers

Keyless entry stopped working on 05 cobalt now i have to unlock door with the key and when i do that the alarm goes off. Help


Lock all the doors from the inside (with all the doors closed), unlock your driver's door by manually lifting the lock, then press it back down after you are out - this will prevent the alarm from sounding when you use the key to unlock the door.

Aug 02, 2008 | 2007 Chevrolet Cobalt Coupe

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