z34mightymachine Posted January 13, 2014 Report Posted January 13, 2014 Hey guys I have a friend with a Pontiac Grand Prix GT with the 3800. His motor and tranny are both finished. He has come across a nice deal for a 2007 Pontiac Montana or Chevy Uplander motor the 3900 and tranny with all the subframe and the computer all wiring harness for $800. Engine and tranny have both 54,000 KM only. The van got hit in the back with damage in the front. Wanted to know if this will fit in his GT ? The only thing I see that is different is that with the 3900 engine it has a 6 bolt pattern, I know because I have the Montana 2007 SV6 with the 3900 and it has 6 bolts. Quote
l67ss Posted January 13, 2014 Report Posted January 13, 2014 Hed b better off with another 3.8. You also need bcm and tcm withe harness and pcm along with a lotta wire splicing and pcm programming. B more headache than its worth. Quote
Imp558 Posted January 14, 2014 Report Posted January 14, 2014 Not to mention the drive by wire gas pedal. That swap would be costly and a ton of labor. Quote
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