BCM Codes - Chevy Colorado & GMC Canyon

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Old 02-05-2008, 12:47 PM   #1 (permalink)
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Default BCM Codes

Does any one have a list of BCM Codes? I had a friend of my bring in a GM diagnostic tool to help me with the no drivers window or door lock problem. When he pulled up the BCM, it came up with a code B1420 Voltage Malfunction. Is there any way to find out what that code means and what all it affects?
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Old 02-05-2008, 01:19 PM   #2 (permalink)
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It means that the BCM sensed an odd voltage. Either because you were modifying something related to the electrical system or because your battery is dying.
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Old 02-05-2008, 02:03 PM   #3 (permalink)
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I understand that, but I just put in a new Optima Red Top, but the problem still persists. I have been hoping that it will auto correct itself, but it's been about 2 weeks now.
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Old 02-05-2008, 02:05 PM   #4 (permalink)
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It takes time for the problem to fix its self. Some said couple hours. Some have it go on for days and days.
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Old 02-05-2008, 02:12 PM   #5 (permalink)
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Also check that your battery terminals are tight. That can cause transient problems.
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Old 02-05-2008, 02:36 PM   #6 (permalink)
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Quote:
Originally Posted by rangerbob
Also check that your battery terminals are tight. That can cause transient problems.
I heard that somewhere before... Who was posting that info earlier and where is that thread? That thread was informative about this issue, I need to find it again.
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Old 02-05-2008, 02:42 PM   #7 (permalink)
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Uh.... I don't remember where it was. I just know that lots of folks have found this to be a problem.
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Old 02-05-2008, 03:55 PM   #8 (permalink)
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The terminals are tight, but for the **** of it, I may switch them out.
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Old 02-05-2008, 05:44 PM   #9 (permalink)
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I get this problem every time I mess with my stereo/speakers. It has happened 4 times since Christmas. Disconnect your negative battery terminal and physically make it touch the positive terminal for about 20 minutes. This will discharge all charge stored in your trucks computers thus wiping the memory. Disconnecting the neg terminal is not enough. You must connect it to the positive terminal to discharge your truck's electrical system. It works for me every time. If it doesn't work for you I suggest going to the dealership and getting a new driver's door master switch assembly (pwr locks.windows). That has cured the problem for some of guys as some of the switches have been found to be defective. Good luck!!!

Also, check this out: http://www.coloradofans.com/forum/viewtopic.php?t=7277

EDITED:

Wow....I didn't realize you were in Germany because I am a dunce...I guess you can't just bomb down to local dealership for a part/service. Anyway, I hope I helped in some way.
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Old 02-06-2008, 12:58 PM   #10 (permalink)
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Quote:
Originally Posted by tjm276
Disconnect your negative battery terminal and physically make it touch the positive terminal for about 20 minutes.
Wow....I didn't realize you were in Germany because I am a dunce...I guess you can't just bomb down to local dealership for a part/service. Anyway, I hope I helped in some way.
I tried that just not for 20 Min, I will do that next and give you an update. Yeah, Germany is cool until you need US parts.
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Pioneer Premier 6 1/2s in doors, Pioneer tweeters
De-Badged and Belltech 1.5"/2" Drop
If you like it Stock, you're easily amused!
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