VISIT OUR WEBSITE TO VIEW A FREE VEHICLE HISTORY REPORT. ?1999 Pontiac Grand Prix GT 1G2WP12K1XF233214 Coupe 2D 3.8L V6 SFI FRONT WHEEL DRIVE EPA Fuel Economy: City: 18 – 20 Highway: 28 – 30 Available Engines: 170-hp, 3.1-liter V-6 (regular gas) 200-hp, 3.8-liter V-6 (regular gas) 240-hp, 3.8-liter V-6 (premium) Available Transmissions: 4-speed automatic w/OD