Swapping my 3400 motor and trans out of my Pontiac into my 2003 Chevy impala

Asked by Nov 15, 2016 at 12:25 AM

Question type: Car Customization

Will the Pontiac motor and trans work in my 03
Chevy impala

1 Answer


yes, quite easily, but make sure to trade the ecm and the harness as well. the vin for the pontiac is stored in the ecm and even though the engine is in all gm cars, if the car years are different the emissions criteria may be different between years.

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