2008 COBALT DOOR LOCKS GOING CRAZY

  • Tiny
  • m.j.c.
  • 2008 Chevrolet Cobalt
  • 10,000 miles

I have a 2008 Cobalt. The power door locks will not work with the door buttons or the fob. If unlocked when shifting into drive they will lock, when put into park the drivers side will unlock not the passenger side. The locks will sporadically lock and unlock on there own even though I pulled the door lock fuse. Is there a solenoid between the shifter and the BCM? I also think that the actuator on the passenger side may be bad since it doesn't unlock like the drivers side when put in park?

Friday, September 21st, 2012 AT 7:52 PM

9 Answers

  • Tiny
  • KHLow2008
  • Expert
  • 41,938 posts

The door locks are linked to the Body Control Module and this is what you should be looking at.

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Friday, September 21st, 2012 AT 8:20 PM
  • Tiny
  • m.j.c.
  • Member

Does the BCM need to be programed after install, or if order by the same part# will it already be programed?

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Tuesday, October 23rd, 2012 AT 3:33 AM
  • Tiny
  • KHLow2008
  • Expert
  • 41,938 posts

Yes, a new BCM has to be programmed.

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Tuesday, October 23rd, 2012 AT 6:00 PM
  • Tiny
  • m.j.c.
  • Member

Thank you
Do they need it in the car or can I get it programed then install it?

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Wednesday, October 24th, 2012 AT 9:02 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,938 posts

It has to be programmed in-vehicle.

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Thursday, October 25th, 2012 AT 12:53 PM
  • Tiny
  • m.j.c.
  • Member

I figure out what was wrong. The passenger side lock switch was shorting out. I replaced the switch actually I replaced both and the locks are normal now. I have to figure out why the fob doesn't work for the locks now. The panic and trunk button works fine.

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Tuesday, July 2nd, 2013 AT 8:18 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,938 posts

Since the panic and trunk buttons are working correctly, I believe the button for arming/disarming is bad.

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Wednesday, July 3rd, 2013 AT 6:12 AM
  • Tiny
  • m.j.c.
  • Member

Khlow2008 you are right. I used one of the other buttons and it locked and unlocked. Thanks.

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Friday, July 5th, 2013 AT 4:44 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,938 posts

You're welcome.

Have a great weekend.

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Saturday, July 6th, 2013 AT 12:30 PM

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