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yes title said body control module (BCM) coding ?
I want change turn signal from 3 click to 5 clicks, when push level down or up?
VW has system that is mode by Ross-Tech.

Thanks
 

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2010 Premium w/ ALL options + 2004 Pontiac GTO LS6 "Beast"
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The GM 29 bit LAN has not been fully mapped out yet. Furthermore you would need to figure out the seed/key for our particular BCM. You are talking uncharted territory here as most folks don't modify their Escalades. You will want to pick up an OBDLink MX to start with as I believe it is the only one capable (and affordable) of sniffing the GM single wire LAN.

If you want to learn more about how GM stuff works, read this http://www.ls1gto.com/forums/showthread.php?t=493177
I hacked the GTO cluster and documented it. Similar tactics will apply, it's just a matter of figuring it all out.
 
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