This is not a job for the the novice ! if you are not very good at car repair DO NOT TRY TO THIS! you will nedd to jack and support the truck. remove the bolts holding the rear cover on. remove the 5/16 bolt holding the the axle pin in and remove the "c" clip. remove the tire,brake drum, and axle. you will need a puller to get the seal out. you can rent this from your parts store. remove the seal. to breplace it, put a SMALL amount of gasket sealer on the outside ring of the seal and using a seal driver(rented) drive the seal in place. reverse the above so re-install all parts. don't forget to refill the the rear with gear oil. use the specs. in your owners man. to buy the right oil. to refill. remove the plug on the front of the the rear. fill till it runs out of the fill hole. reinstall the plug and tighten. I can't stress the fact that you really need to know what youare doing to do this!
Remove the 5/16 head bolt then pull out the pin, push in the axle and remove clip.
You have to change axle and hubs
take it to a shop
After removing axle from steering knuckle you can pop it out of tranny with a pry bar.
bad therm actutor in 4wd front axle
177ft/lbs
With a pry bar in the right spot and some leverage it will pop out.
Rear you have to change the entire hub assembly Front you have to remove the axle shaft
what size is the axle nut on a 03 chevy cobalt
Long enough for the bearing to sieze, wear the axle into, and cause you to have an accident. If it were my truck, I wouldn't drive it period, until this was repaired.
To check the rear axle ratio on your Suburban, you need to safely jack up the vehicle to get access to the the rear axle. Then there should be a metal tag on one of the bolts on the rear axle cover indicating the axle ratio. The ratio varies with different options and load capacities, so it's not the same for all Suburban's.
the library should have a shop manual for this vehicle, you can make copies of the right sections :)