In 1999, the Grand Am was redesigned again and entered its fifth generation, with its only identical sibling being the Oldsmobile Alero. The standard engine remained the DOHC 2.4 L I4 with the 3.4 L V6 optional. The 2.2 L Ecotec I4 replaced the 2.4 L as the standard engine in 2002. In 2003, the design was further refined by removing the ribbed body cladding for a "cleaner" appearance.
This generation of the Grand Am was sold in five variants, the SE, SE1, SE2, GT, and GT1. Each variant added various features such as power windows and locks, dual rear exhausts, a rear spoiler, a more powerful engine (3.4 L V6) than the Ecotec, or alloy wheels. Safety features as dual front airbags and anti-lock brakes were now standard throughout the line, as well as traction control (ETS). However ABS and ETS (Traction Control) were optional on the 2003-2005 Grand Am SE, but standard on SE1, SE2, GT and GT1 models. The Grand Am enjoyed success as a compact car filling a niche as a comfortable, affordable, reliable, yet sporty car.
Despite its success, the Grand Am finally came to an end. The last Grand Am sedan rolled off the assembly line on December 10, 2004. The coupé will most likely be dropped at the end of 2006, with the entire Grand Am line being replaced by the Pontiac G6, which is based on the GM Epsilon platform. It is interesting to note that the Grand Am was Pontiac's best-selling car before being replaced.
Source: Wikipedia (original)