According to GM literature (see attached) the following modules are all locked to each other and communicate to each other to prevent vehicle theft:

ASDM - Air Bag System Diagnostic Module (also known as) SDM - Sensing and Diagnostic Module the name given to air bag modules used in General Motors vehicles

BCM - Body Control Module

EBCM - Electronic Brake Control Module

ECM - Engine Control Module

HVAC - Heating Ventilation and Air Conditioning Module

IPC - Instrument Panel Control Module (speedo cluster)

SCLCM - Steering Column Lock Control Module

Hence a used module from another C7 should not be installed because it will have a wrong "environmental ID" saved.

GM wants you to buy a brand new "virgin" module which will then be uniquely coded to your car.

But the Immobilizer Master (BCM) is required to receive a "certain number of correct environment identifications" in order to authorize the powertrain control module to allow normal engine operation.

If my interpretation is correct that means that at least one if not more of these modules dont need to have the correct environmental ID and the engine will start properly anyway.

What is your experience regarding this subject?

Did anyone of you replaced one of the above modules with a used one?

Did you encountered any immediate or long term problems?

I would like to install an used EBCM module from another C7 but need to know if that is possible.

 

Grump you have asked this question a 100 times and you got the same answers from me and another trusted member of this forum

Flash the BCM and any modules with your serial number using GDS2 using the GM TIS/SPS web site to get the files that belong to your car ...
That is the programing tool they are talking about above
Dave

 

If I use my curent serial number I will only be provided base c7 specific software on the GM TIS/SPS website.

However the Z51 manual transmission has different gearing and the base c7 software is not compatible with it.

Most likely the cruise control will not work in the higher gears due to that.

Hence I need to use Z51 software.

Z51 software will only be provided if I use a Z51 VIN.

If I use a Z51 VIN it will differ from my current VIN and I might run into troubles with the immobilizer.

If I flash all my modules with software from a Z51 VIN it might work.

However I think that asking a tuner to flash a dry sump tune on a base C7 ECU will be all I need to get the dry sump LT1 and Z51 manual transmission running in a base C7.

What I want to do is to install a dry sumped LT1 and Z51 manual transmission as well as an ELSD into a base C7.

 

So you are making assumptions that are not true, the cruise control does not care what gear ratio is installed bur your speedometer will , that can be fixed in the tune ...

And the low oil light , I am confident someone can set that error to "not report in the tune

You need to email or call a tuner to see if I am right and not try to get answers here as you are only going to get frustrated

As far as the other mods Its not like the old days where you can just bolt a new motor and different trans into a car .... as there are way to many modules to worry about talking to each other etc ....

Why do u need a EDSL .... is this going to be a serous track car ? There is nothing wrong with the factory positraction unit as its been used for may years

And converting from an Auto to a manual .... you just need to buy a different car purchase a donor car and switch everything over ...

Dave

 

As I already wrote I am starting with a manual base C7, not an auto one!

C7 Z51 owners which received a wet sump tune by acccident reported that the cruise control will not work in higher gears, an low level oil light starting to appear and the fans running constantly.

Hence it was not an assumption from my side but facts! I changed the final drive ratio on a FIAT and I can not use the cruise control in 6th gear as well.

I think the difference in wheel speed gets too large in the higher gears and hence the system shuts off cruise control in the higher gears.

Obviously the speedo will not work correctly as well if there are changes made to the gearing of the car.

According to the corvette engineeers the best performance related aspect about the C7 over the C6 is the ELSD!

Hence I want to install the ELSD, I already sourced it!

 

Ok I am confused I. Another thread you say u need to convert auto to a manual ... since we made recommendations in both threads any yet you still challenge every time ....

I am sure anything can be accomplished with enough time and money but at what point so you draw the line...

I am done...
Good luck with your endeavor
Dave

 

Sorry but I think you are mistaken, at no point in time I wrote that I am converting from an auto to manual.

I am converting from a base c7 manual to Z51 manual.