To replace a wheel bearing on a Pontiac Torrent, start by safely raising the vehicle and removing the wheel and brake caliper. Next, remove the brake rotor and disconnect the ABS sensor if equipped. Unbolt the wheel bearing assembly from the steering knuckle and remove it. Install the new wheel bearing assembly, ensuring it is properly aligned and torqued according to the specifications outlined in the Pontiac Torrent automotive repair manual. Reassemble the remaining components in the reverse order.