The 2002 Oldsmobile Alero is available as a 2-door, 5-seat coupe. Starting at $22,395, the 2002 Oldsmobile Alero GLS Coupe is powered by a 3.4L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 29-mpg on the highway. The top of the line 2002OldsmobileAleroGL2 Sedan , priced at $ 21,080 , is powered by a 3.4L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 29-mpg on the highway.