The Pontiac Grand Prix is an automobile produced by the Pontiac division of General Motors Corporation. First introduced as part of Pontiac's full-size model offering for the 1962 model year, the Grand Prix name has also been applied to cars in the personal luxury car market segment and the mid-size offering, slotting below the large Bonneville in the company's lineup. As of mid-model year 2006, the Grand Prix is Pontiac's largest automotive offering in production, superceeding the recently cancelled Pontiac Bonneville program.
The Grand Prix was updated for 2004 on a revised version of the GM W platform. 2005 saw the high-end GXP trim as the successor for the now-defunct Bonneville. The first 2004 Grand Prix was built on May 5, 2003. A notable addition to the 2005 line is the GXP's small-block 5.3 L V8, the Grand Prix's first V8 since 1987. With the closing of the Oshawa plant that produces the car in 2008, the Grand Prix will likely end production, and for 2009 it may be replaced by the Zeta-based G8.
The Grand Prix remains basically unchanged from 2004. With the Base coupe, the GT, GTP and the GXP. 2005 Is the last year of the GTP. In 2006, the GT offers the Supercharged 3800 Series III Engine. The GT has the potent 3800 Series III engine, which gains a 20 bhp boost from intake and head redesigns, as well as an electronic throttle body. The GXP powerplant is the LS4 V8, a 5.3 litre Displacement On Demand engine based off of the legendary LS1 block. It has a shortened crankshaft, and a host of other modifications to make it fit into a FWD vehicle. The GXP also has TAPshift, a Formula One inspired technology that allows the driver to control gears semi-manually. The engine has 303 bhp and 323 ft·lbf of torque.
For 2006, little has changed for the Grand Prix. The three options are the Grand Prix, powered by the 3800 Series III V6, the GT, powered by the 3800 Series III Supercharged V6, and the GXP, powered by the LS4 V8. Next model year, 2007, is rumored by many to be the last of the Grand Prix's incredibly long run, and many enthusiasts are sad to see it go, but the potential for Pontiac to make a turning point out of the car that replaces it, gives hope to the community.
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