lsi dash loom plug into p28 ecu

i am swapin my lsi d15b2 engine to a d16z6 and changing my engine loom and putting in a p28 ecu
when i take the old ecu out will my old dash loom plug straight into my p28 ecu or will i hav to change the dash loom thanks
when i take the old ecu out will my old dash loom plug straight into my p28 ecu or will i hav to change the dash loom thanks