It is best to use the ECM that goes with the engine. I suspect you could switch them with very little difference. Sometime with that 4 year spread, they might have moved some components on the engine and your Buick wiring harness will not plug into the Pontiac, you might need to get the Pontiac engine harness.
I have a 2004 Buick with a 3.8 and was wonder if the motor from a 2008 Grand Prix would work with the ecm
2004 Buick LeSabre Custom Sedan FWD
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Maintenance & Repair
selling used cars in bc do you or not it seems USA always
2004 Buick LeSabre Limited Sedan FWD
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General
Turn over at all. It on me yesterday and I went back to get it today and it started right up. No security light or check engine light on. On the way home it just died...battery light came on and i...
2001 Buick LeSabre Limited Sedan FWD
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Maintenance & Repair
Trying to determine where the be problem is at. Passenger window, goes down but not back up. Does not work on the DD or PD, down works on both. Brand new window regulator, bought another one to...
2001 Buick LeSabre Limited Sedan FWD
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Maintenance & Repair
What cars are compatible for my Buick I have a 2003 Buick LeSabre limited and I was looking for a motor that can fit it
2003 Buick LeSabre Limited Sedan FWD
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Maintenance & Repair
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