CCM for ZR1 or not?

[rbidwell]

Is there anyway of visually identifying an ECM as being for a ZR-1 or base model? I have access to an ECM with no part number or any other indentifiction on it. When I install it in the car the cooling fans start and I get a code 41 I have a stock ZR-1 prom installed. My guess is that is is a base unit.

Thanks for any help will be greatly appreciated.

[-=Jeff=-]

I believe looking inside the ECM there is a daughter board for the LT5. The LT5 ECM is also a taller case if I recall right

[rbidwell]

This one has no no daughter board. Thanks you very much.