At this point you do not have an issue with bad relays.... Nor the injector driver circuit...
Disconnect the Negative cable at the Battery..
Remove the Passenger side Hush panel, Look up and you should see a the ECM with 3 connectors and a battery of wires.. The ECM will be held in with one 10 mm bolt iirc..
Swap out the Mem-Cal chip from you old unit to the new unit
Connect the Negative battery cable
Start it up...
I have seen a lot of these fail... Even my 91'* have Reman ECM'*...
The Le has an AC Delco Reman... And the SSE has a Cardone Reman
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