2004 Chevrolet Malibu Maxx LT 4dr Hatchback (3.5L 6cyl 4A)
I love my Malibu Maxx. It is the first car I have ever purchased, and one of the best decisions I have made. After 1 year and 20,000 miles, I have not had one problem with the car. The car has great pickup, even at highway speeds. I have had it up around 120mph, and the car didn't rattle or feel like it was going to fall apart at all. It was very smooth and comfortable. I would tell everyone to get a Maxx, except that then the market would be flooded with them lowering my value. The Maxx will begin the resurgence of General Motors.
Electric power steering, and horsepower
Integration of the Onstar/XM/Radio antennas into one unit on the cars centerline. I would also make a rear wiper standard (it wasn't an option on my 2004 model), I would also then retrofit all 2004 models with a free rear wiper.