This is a very popular GM starter for 2001-2005 that mostly fits engine sizes 2.2, 3.1, 3.4, and 3.5. Rebuilders call it 6491. ID the unit with a measurement from the bottom of the magnet housing to the back of the starter 3 1/4 inches. (the black areas in the picture below)

Kits include new solenoid and bendix, new brush holder ass’y, all the bushings and snap rings you need to do a good quality rebuild.