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Bcm Programming?
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Question
lcorrell
Background: I recently purchased a non-running 2003 Chevy Silverado 2500HD 4x4 ext cab with the 6.0 and I've been working to diagnose the problem. I have no signal on the Class 2 serial data line, thus no communication with a code scanner. Following the troubleshooting steps I have isolated the BCM from all other modules on the data line and still have no communication with the BCM. I have checked the wiring for opens, shorts to ground or power, or high resistance and the wiring seems to be fine. So the next step in the troubleshooting procedure is to replace the BCM. GM dealer wants $257 for a new BCM and minimum $90 charge for programming it. Says I have to install the module then bring the truck in to be programmed.
Now the questions: If I buy a new BCM through GM and install it, will the truck start and run off the blank un-programmed BCM so I can drive it to the dealer for programming? If that won't work, I can get a used BCM for $75 - will the truck start and run off the used BCM with non-matching VIN (after passlock re-learn)? Can the used BCM then be re-programmed at the dealer to have the proper VIN info and match my truck?
Thanks for any help.
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