GM ECU model/part numbers

[Shannen Durphey]

There are a couple of things that might help.  1)  is there a prom or
memcal inside?  Read off the 4 letters/4 numbers that are on the
silver sticker.  Someone here can look that up.  2)  Does the ecm have
a socket for a prom or for a memcal?  3) call GM parts department,
give them your number. That # isn't anything I recognize.
Shannen

Gwyn Reedy wrote:
> 
> Where do you find the number of the ECU (such as 747)?  I picked up a TPI
> setup and the ECU says remanufactured by GM. There is a Service Number on a
> tape on the outside of the case but no other numbers I can find. The number
> on it is 01270879 but that doesn't match the commonly mentioned TPI ecus.
> There are magic markings on the case that say 86 Firebird 305 TPI,  but I
> don't see that kind of service number as an ECU in any list I can find.
> 
> So how do I figure out what I've got?
> 
> Gwyn Reedy
> Brandon, Florida
> mailto:mgr at mgrcorp.com
> 
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