Hey all,
I recently purchased an LS2 motor out of a TBSS to put into my E46 sedan. It came with an E38 ECM and harness from a 2007 Silverado 2500 6.0L. I will be using my E46 ZF 320Z 5-speed manual.
Currently, I'm in the research phase, and have spent about 2 months reading-up about potential issues I may run into. It is my understanding that this ECM is going to be expecting VSS data over CAN BUS. I understand that without the TCM steaming this data, the ECM will default to a 186mph static reading, which in turn causes issues with RPM hang and other throttle control oddities.
If I understand correctly, a solution would be to have the base OS (my terminology may be wrong here) swapped to one that would come on a manual car. I understand that this is not that simple, and not something I could use HP Tuners for, due to certain segments being inaccessible to the tool. I also realize that even with the correct GM flashing tools, one must be careful of which OS the ECM currently has VS the one you want to flash.
My ECM: Service 12597121 / OS 12618278
I found this document that groups together OS numbers which are "known" to be compatible. However, my OS number is not listed. I see there is one that is one digit off, I inserted mine in red on the screen shot below:
I discovered that OS 12617631 (two above where I inserted mine) was used for LS3 Corvette 6-speed, so that would be ideal. I would remap for 6.0L in HP Tuners later. The problem is, I'm making a big assumption that my OS falls under that column, and from the looks of it, they really don't follow any strict serial sequence.
Some questions:
- Is my understanding of what needs to be done correct?
- Is my assumption that my OS number falls in the 2008 ECM column a dangerous one?
- Would it just be easier to order an ECU online, flashed to a 6 speed 'Vette VIN? (I found a few.)
- Any recommendations on someone who can do this in Canada? I'm in the (Montreal area.)
I called a few places, and they told me that flashing to a different VIN was not possible, even with the GM flash tools. I'm thinking they just aren't familiar with this process.
Also, I would like to stick to ordering / shipping within Canada, as I got royally destroyed when ordering HP Tuners from the US. What was supposed to be a $399 device ended up costing almost $1000 CAD after adding UPS brokerage and factoring-in the USD/CAD exchange rape...
Thanks in advance for any insight you may offer. I recognize that many of you have a lot of time under your belts messing with this stuff. It's always appreciated when knowledge is shared.
Best,