Hello folks.
Quick run down. Repowered from a 5.0 GXI to a 5.7 GI. Did buy ECM for 5.7. Also 5.0 ran great and as expected. So yes I broke a good running boat.
Using same wiring harness but as far as I can tell same harness between GI and GXI. FYI 5.0 setup was emmissioned for California...
