Buick engine

Asked by steven Aug 07, 2018 at 05:54 AM about the 2001 Buick LeSabre Custom Sedan FWD

Question type: Car Customization

I would like to know if possible to swap out my 3.8 engine
for a ls4 engine

1 Answer
10,210

txbarney answered 5 years ago

Sure it is possible........ask any hot rodder........but it is not plug n play. You would need to get the ECM from the 4 cyl just to make it run, then connecting the ECM to the BCM could be another issue. If you have a bad 3800 V6 (which is rare) there are thousands of them around. I know a guy that got a 40K engine complete for $400.....then that is plug n play

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