You would have to do some wiring to make it work. I think it needs extra power and grounds for the display to work, as well as some more data lines.
I remember thinking that it would not be too hard, and back in 1999, that Grand Prix GT that I was going to buy, it had the n/a 3800, but the same DIC (the boost gauge was just disabled). Worked just fine.
I was thinking about getting one of those, and hooking the boost gauge up to the TPS so I could tell what the computer was seeing as my throttle percentage, but then I realized that I don't know how the boost gauge gets it's signal. I think it is controlled by a BCM.
I THINK I still have a complete 2002 Grand Prix wiring diagram in PDF form. If you want it, I can try to email it too you. Just PM me your email address if you want it.
gotcha, thanks for the PDF offer but i purchased a year of service for my GP from eautorepair.net. it's like a chilton/haynes manual on crack, i love it

i suppose i probably should've consulted the wiring diagrams they had before posting
