1991 Grand Prix GTP Launch - Bonneville and Grand Am were the major improvements in the Pontiac lineup for 1992, but for 1991 it was the introduction of the Grand Prix GTP with the new Twin Dual Cam V6. Here is the official Pontiac Launch video for the Grand Prix GTP with Twin Dual Cam V6 | 30 Millionth Pontiac Wentzville Assembly GM Bonneville SSEi UAW 2250