ORIGINAL: BadStratRT
i would think that they would use the "performance" V6...similar to what comes in the higher end non-gtp and non-gxp grand prixs....i dont recall off the top of my head what size it is, but i seem to recall that GM has an NA V6 that has as much power as the old 3800SII blown motor, and it is the next highest motor in the monte and grand prix to the V8 models.
That is the 3.9L 60 degree OHV VVT V6, it's in the Monte Carlo, Impala LTZ, G6, Malibu SS, but it is not in the Grand Prix. The Grand Prix has the NA 3800SIII, the 3800SIII supercharged version, and the 5.3L DOD OHV V8. The 3.9L produces the same basic hp as the supercharge 3800SII, but it doesn't produce the torque. The supercharged 3800SII produced 280 ft-lbs and the 3.9L produces around 240 ft-lbs.