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Old 08-26-2012, 09:25 PM   #1
hise0001
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Default 2002 L100 BCM - Does it HAVE to be reprogrammed

We have a 2002 L-100 and it looks like the bcm is going bad. My daughter was driving down the road and the gas gauge dropped to empty, low fuel warning sounded, and then gauge went back to full... security light was flashing and then stopped. Its been driving fine since then however, we just noticed the odometer reset to 000000 miles.

so, my questions are:
1. can I replace the bcm myself.

2. where's located?

3. do I HAVE to have it programmed (other than the 30 minute DIY procedure)

I already have a branded title (salvage vehicle) so I don't care about mileage being off... It's going to the junk yard when I'm done with it. But, is there anything else I should be concerned about doing a basic DIY reprogram of a new bcm?

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Old 08-27-2012, 12:29 AM   #2
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2003 L-Series 3.0L Sedan
Default Re: 2002 L100 BCM - Does it HAVE to be reprogrammed

1-You can replace the bcm (on top of the glove box) but only with a used one already programmed. Mileage stays with used bcm's. The 30-minute relearn is for this purpose.

2-You cannot program or buy a new bcm. Only GM will replace a bcm with a new one and program it as its only programmable using GM's Tech II tool.

There's no re-programming of any bcm's. Search past threads about bcm issues.

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