If you are asking about adjusting the wheel bearings there isn't any adjustment. The front hub is serviced as an assembly.
Please clarify your question as in front or rear axle.
You can find a 1989 Chevy front axle diagram at most Chevrolet dealerships. Most local libraries will have Chevrolet service manuals with the front axle diagram.
Front axle nut should be a 35mm.
No you cant,, find dually spacers off the front axle from a Dodge dually from i think 94-98 bolt those on the front axle of your Chevy,, or find Chevy hubs
I'd need to know if you had a solid front axle or a double wishbone independent front suspension in order to answer this.
take it to a shop
NO.
36mm
32mm
Axle seal is bad and needs to be replaced
You don't, you replace it.
118 ft lbs