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I have an 09 Escalade ESV, the radio and bluetooth have been acting up. The dealer said it needs a new Vehicle Control Module. He said it controls not only the radio and bluetooth but a lot of other things. I'm just curious what else does this part control? How essential is it? Thanks.
 

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2010 Premium w/ ALL options + 2004 Pontiac GTO LS6 "Beast"
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VCIM is essentially the onstar module. I would think the truck would run fine without it, but you would lose onstar and Bluetooth.
 
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