PCM and BCM Swap possibility???

[goldbergv95]

http://tis2web.service.gm.com/tis2web
Is this what you want?

YES!!! perfect!!! Thanks a lot!

Good to hear, non-issue then.

If you changed the VIN, the OS would be the same. If you upgraded the OS to an 03 one to get the fuel tank calibration, then the OS would be different. Do you know for sure the fuel tank calibration is stored in the BCM or is it stored in the PCM? Figure that out first, then determine if you need to flash the BCM or upgrade the PCM OS to an 03 (go to 05 if you're going to do it).

Yeah the gm tech 2 is about 2 grand but I heard the software updats is only free for the first 5 months. I might get it since nowadays gm dealers have been pretty busy lately.

Didm't you say the fuel change is stored in the PCM? Regardless, I have to reflash the bcm if I change to the 03 vin or else i would get electric problems. But something still bugs me. Even if I changed the Vin is there a way also change the OS based on the 2003 tbs? Or will I have to get a flash from the dealer.

BTW, I would do a 05 swap but 05s have air bag and other features that 02s and 03s dont have which might fail the state inspection. Plus I saw an additional wire that is connected to a connector located on the exhaust manifold that 02s and 03 dont have.

[ScarabEpic22]

Didm't you say the fuel change is stored in the PCM? Regardless, I have to reflash the bcm if I change to the 03 vin or else i would get electric problems. But something still bugs me. Even if I changed the Vin is there a way also change the OS based on the 2003 tbs? Or will I have to get a flash from the dealer.

BTW, I would do a 05 swap but 05s have air bag and other features that 02s and 03s dont have which might fail the state inspection. Plus I saw an additional wire that is connected to a connector located on the exhaust manifold that 02s and 03 dont have.

I assume its in the PCM, but you'd have to figure out where the IPC get the fuel sender signal from.

No, you dont have to flash the BCM if you change the PCM OS, who told you that? Just because you're running an 05 OS doesnt mean you cant put your 02 VIN in...

The airbags and everything dont tie into the PCM...thats not an issue. The 04+s have the AIR injection system on the exhaust manifold so you just have to turn that off in the tune.

[goldbergv95]

No, you dont have to flash the BCM if you change the PCM OS, who told you that? Just because you're running an 05 OS doesnt mean you cant put your 02 VIN in...

Well at least it was not you lol. No really, I thought that was the case from experience. But didnt we had this discussion when I wanted to switch to an 06 ecm with engine wiring, i maybe i was wrong but didnt you think that it might affect the bcm not beable to communitcate efficently? Im a little scared to do the 05 swap unless I do the engine wiring at the same time then I might do it. But for the time being Ill try the 03 first. Then when I have time i might do 06 or possibly 09 swap.

So the only way to change the vin and the os is through the dealer or can i do it?