Spoke with GMPP when we ordered our engine (via Karl's Performance Parts) and they do not have the ECM available yet and don't have any info on when it will be available. They dumped a bunch of the software engineers in recent cuts and the new ecm programming for a crate motor is not high priority for the few programmers they retained. Street and Performance has engineered their own coding to match the new LS7 and are loading that into the ECM so we can deliver this car.
Jim
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