Thread: Getting a used BCM programmed at the dealer

Originally Posted by sparkydog

Have you looked into aftermarket anti-theft bypass products? I don't have direct experience with your year, but I had good luck with late 90's GM VATS bypass. It's a cheap ($30) little chip/harness thing that sits in between the BCM and the ECU and tells the ECU that everything is fine with the BCM so go ahead and start and run. Perhaps there are similar things available for your year.

Thanks for the tip but I can't seem to find anything like that online for my car. If anyone knows if this thing exists for at 2007 GP please let me know.

Originally Posted by wstefan20

Sorry to hear! As far as the radio, I believe you can take it apart and de-solder a chip to get them to work if I remember correctly, but not sure about the no-start. I know for sure you can bypass that with a remote start device, but that probably wouldn't be cost effective. Not sure what other workaround there would be... I know rockauto.com has some decent prices though.

Interestingly I believe my radio already has the chip removed, its an "unlocked" six disc unit which did not come factory with my car. unless there's another way to unlock a OEM head unit that i'm not aware of and normally it works fine without having to be programed so its odd that it was still locked out with the new BCM. Only thing that makes sense to me is the fact the car I took the BCM from had the monsoon system but I think it was you that said that doesn't run through the BCM anyway.

As far as the aftermarket remote start idea, I actually already have a Compustar remote starter installed. I never actually thought to try starting it with that when the new BCM was in there, maybe I'll give that a shot at some point but I don't think that will help with the radio or anything else the BCM will be locking out even if the car does start.

Originally Posted by Scottydoggs

id try a security learn, might work on a bcm.

then if you can still get the radio out of the car you got the bcm. it should work. hoping you got it from a JY.

is there instructions somewhere on performing a security lean? I'm a little nervous on messing with anything security wise since I don't want to end up bricking my car and unable to fix it while simply trying to get a luxury feature to work. I did get the seats, BCM and climate control module from a JY cheap and did not take the radio which has been crushed along with the car at this point.

I went to another GM dealer today and discussed my options as far as what they could do and was told it isn't possible to get the heated seats working the intended way in my car. The BCM needs to be VIN matched to function and once the VIN in the BCM has been set it can not be changed so a used BCM is useless. This makes me wonder about all the used BCM's for sale online. They also said a new BCM wouldn't work because as soon as they enter the VIN of my car it will disable the heated seat function and just be a clone of the BCM I already have. So unless someone here has found a work around it looks like I'm SOL.

If no new solution comes up I might look into wiring up a hidden switch somewhere to manually control the heaters. It seems its as simple as putting a switch in place of the heated seat relay. I can only assume the system achieves its high/low heat function by controlling how long the elements are on with a thermistor. Hopefully It wont get to hot and burn out since there would be no form of high limit without the BCM control if I where to leave it on. I'd also have to check if the fuse has power at all times or only when the car is on because this could end up killing my battery if left on. I could also look into the older generation harness swap that was suggested.