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.

Your Answer

Add photo

Related Questions

  • engine swap 25 answers

    I wanna do a engine swap. I found a 3800 SC(motor and tranny,pcm,harness,etc) easily a complete motor.Came outta a 02 gtp. My question is...will it fit and how much difficulty,is involved with the s...

    2006 Pontiac Grand Prix Base


    Car Customization

  • transmission 1 answer

    I have a 84 impala with a v6 that Im swapping out for a 350 but I wanted to know if my trans would be the same from a impala with a 305 or 350? I believe that chevy was putting the same trans in them ...

    1984 Chevrolet Impala


    Car Customization

  • Engine swap for 2002 chevy cavalier 2.2 to increase horse power 1 answer

    What other kinds of engines could i swap into my 2002 chevy cavalier 2.2 to increase horse power

    2002 Chevrolet Cavalier


    Car Customization

  • GT1 swapped to Comp G motor and trans but paddle shift won't work 6 answers

    I have an 04 GT1 and with some help I swapped in a supercharged 3800 motor paired with a transmission from a comp g which has the paddle shift option and I then swapped out the shifter and steeri...

    2004 Pontiac Grand Prix GT1


    Car Customization

  • 2000 chevy impala 1 answer

    I swapped a 3100 motor out of a Pontiac grandprix and put in a 2000 impala that had a 3400 motor in it does computer and wiring harness have to be change or jus the computer?

    2000 Chevrolet Impala Base


    Maintenance & Repair


Search Car Customization Questions

Car Customization Experts

#1 Tom Demyan
Tom Demyan
Reputation 5,520
Reputation 3,460
#3 dandyoun
Reputation 3,300
View All

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.