How do you change the wheel bearing 92 buick lesabre

The axle shaft retaining nut ?

either brake pads or wheel bearing

should be in the front beside the motor if im thinking right they were front wheel drive cars

The bearings on a LeSabre are part of the hub assembly. The hub and bearing will have to be replaced as a unit. To do this you'll need to raise the car, remove the wheel, remove the caliper guide bolts, lift and support the caliper-I use a bent metal clothes hangar to support. Do not loosen the brake line. Slide the brake rotor off the lugs. Disconnect the electrical connector for the antilock brake system. The connector is behind the wheel. Then remove the four bolts holding the hub assembly. The bolts are behind the wheel. Be sure to hold the hub while removing. To install reverse the order. Be sure to check and tighten bolts to specifications when reassembling.

the manual said it's under the steering wheel

if it is a belt in the tire, when you slide your hand over the tire you would feel a bulge that feels like a air bubble. if not than you need to have them check the wheel bearing and the power steering rack.

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The brake rotor needs to be removed, drive shaft nut in center of hub then 3 bolts hold the hub assembly to spindle from back side. if it has abs unplug it then some work will need to be done with a hammer and chisel to work the bearing out of spindle and axle shaft from bearing

could be the CV axle or the hub bearing