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Old 08-24-2011, 04:55 PM   #9
fdryer
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Join Date: Jan 2006
Location: NYC
Posts: 41,068
 

2003 L-Series 3.0L Sedan
Default Re: Can I replace BCM myself?

Well, you can try shopping around but beware of used ones from new blanks. All used bcm's retain the car mileage and cannot be erased. Only new blanks programmed only from a GM service center can do the replacement perfectly as GM is the only authorized dealer with the proprietary software to use a Tech II to program bcm's. No one else.

Buying used bcm's is a gamble as mileage from this bcm will never be the same as yours. The used one may have more or less mileage than the one it replaces. Very few bought used bcm's with less mileage than the one it replaced.

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