with it using the third generation of the W-body platform. The 3.8 L supercharged V6 was carried over but now made 260 horsepower. However, the top dog was the 5.3L LS4 V8 that made 303 horsepower and 323 lb-ft of torque. 2008 was the last model year of the Grand Prix, as it wo...
Gilbert, John
I am also relatively new to the "GTP" experience. I purchased my 2002 GTP 4 days ago. I have been doing ALOT of research on mods and tuning the last few days. The solution to most of your problems would be to get the PCM (Digital Horsepower Inc. v1.0 PCM for Grand Prix GTP )....