i own a 2000 and im looking at a 1999 trans.
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2000 Pontiac Bonneville Question: will a transmission from a 1999 boneville fit a 2000 boneville?
Answer #1patrick mannion from Greg Solow's Engine Room, June 02, 2011, 15:36Master
You would have to call the dealer or an AAMCO or transmission shop, even a slight difference or gear ratio difference, a sensor in a different location is going to cause havoc so make absolutely certain it is a different fit. Ran into a Camry with a check engine light on, customer neglected to say the transmission was replaced.