how do I change front wheel bearing on my 86 4x4 blazer any help would be greatly appreciated thanks.

 

Remove the wheel. Remove the axle nut (large nut on the axle shaft). Remove the brakes. Remove the 3 bolts retaining the hub assembly to the steering knuckle. Free the hub assembly from the steering knuckle. Press the axle shaft out of the hub. Reassemble reverse of disassembly.