Will a 2006 buick lacrosse engine run in a 2003 pontiac bonneville?

Asked by Jun 24, 2015 at 06:27 PM about the Pontiac Bonneville

Question type: Maintenance & Repair

I had to replace my engine in my 2003 pontiac bonnevile and i ended purchasing a 2006
buick lacrosse engine to put in it. the engine is all hooked up in my car but now the car
wont start. any suggestion?

3 Answers

Did you use the ECU, ignition switch and key from donor car? And does it crank over and try, or not even turn over?

Will I be able to purchase one because I ended up getting my engine off ebay motors..if not how do I go about fixing the issue so it'll start. It's turning over but it's like the computer is not readin that it wants to start. I kinda need to know what can be done because I have to much money wrapped into this. Thanks

5

As long as it's a 3.8 ltr, 6 cyl, Series II engine, it should be compatible. I had my 2000 SE motor replaced in 2010 with a Buick motor (I forget what model now), and it worked fine. Did you replace the water pump? Was told this almost always needs replaced in conjunction with engine swap...

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