CopiJ

Does anyone have information on where the Onstar VCIM Modue is located and how to disable it?

CopiJ

Do any of the 79 people that read this that knows anything about where the VCIM is located?

Steve Gordon

Its located under the drivers seat. I realize this is an old posting and you probably have solved your problem....I have the same car and just paid a GM dealer 300 dollars to diagnose why my battery goes dead every 2 days....they say its the onstar module and the unit costs 500 and 150 to re and re it. I was told the car will not start with the unit disconected. I'm very disappointed in Chev.

Lifted07

I hate to say it but you have a GM dealer filling you full of crap and one that doesnt want to deal with onstar. Ive disconnected many and never had one that wouldnt run after. It will however create a number of lights to come on. The onstar unit is capable of doing a diagnostics check and when simply disconnected it will give a false warning. GM does make a wiring connect to replace the unit when removed, Good luck getting them to admit to it tho.
A good dealer can get the info and the adapter to do the job.

tech2

depends on how the CAN lines are configured. On some gm systems if you unplug a module, all modules wired after that module can't communicate.

I've looked at the set up for your 09 aveo. From the diagram I looked at the CAN lines have parallel connections. Unplug it and see what happens. key off before plugging in or unplugging any module. It will set "undefined" codes as other modules will be looking for information from the unplugged module.

If it doesn't start you know others modules have lost communication also.

Steve Gordon

thanks

Atlasfallen

After much digging I have the answer.

There is a purple and a yellow wire in each of the two wiring harnesses that connect to the Onstar module. Unplug the module, cut those four wires, connect the yellow to the yellow and the purple to the purple.

Cheers!

tech2

and if this is a CAN communication line remember to make each repair exactly the same... changing wire length to one and not the other will cause corruption by altering signal timing.