How do you change a rear wheel bearing on a 2000 Pontiac Montana?
You need to replace the rear wheel hub - bearing and speed sensor inclusive
Wheel bearing is part of an hub assembly. Remove wheel, remove caliper & rotor. Disconnect speed sensor, unclip connector. Remove shaft nut in front & 3 bolts in back - replace with new hub/bearing/studs/wheel speed sensor assembly tighten to spec. You need to also remove the big shaft nut. When replacing make sure axle nut (33mm) is torqued to spec. [160Nm (118lb ft); hub bolts (13mm) torque spec: 130Nm (96lb ft) - 2000 Montana]
The 1996 Pontiac Grand Am is a front wheel drive application. This vehicle has sealed (non-serviceable) and bolt-in wheel/hub bearing units. Removing and replacing them involves removing the wheels/tires, brake rotors and then unbolting the wheel/hub bearings. The General Motors OE front hubs are AC Delco #2025K.