What should torque be on the large bolt that holds the front hub assembly/wheel bearings onto front axle?

the four axle nuts, 98 ft lbs, tighten in criss-cross pattern.
The hub nut/wheel bearing, 148 ft lbs, use new nut, don't let vehicle weight sit on the ground while torqueing, it could damage the wheel bearing.
If I left something out, give me a holler.

The front wheel bearing is a hub and bearing assembly. To remove you will.... 1. Remove the tire 2. Remove the axle nut. You can put a punch in the fins of the rotor to keep the assembly from turning while you rmove the nut. You can can do the same thing when you torque the axle nut. 3. Remove the caliper and rotor. 4. Unplug the abs sensor if equipped. 5. Remove the three bolts that hold the hub to the knuckle. 6. Rmove the hub. If you need torque specs let me know and i'll get them for you. It is absolutely critical that you torque the axle nut to the proper spec!

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

The wheel bearings for ALL GM cars 2007-2009 ARE covered under the powertrain warranty...5 year 100K warranty that is. ...if you have a 2007-2009 GM car- even if it is a USED car and you are the second or 3rd owner? It's COVERED. call dealer to find out! While the wheel is on ground, loosen the large nut on the axle, Then jack it up, remove the caliber and rotor, unhook the ABS connector if you have it, remove the axle nut all the way, and then the 3 bolts that hold the hub assembly, tap the hub assy with a hammer until it slides out and the install the new one. the bolts that hold the hub on are behind backing plate. if you cant get to top bolt for hub, you can push axle in to make more room. make sure you torque all bolts. if you can not get torque wrench on back hub bolts. then tighten as tight as hard as you can with a socket wrench. but put correct torque on axle nut. call auto-zone and they should be able to tell you the axle nut torque. if no, call or visit dealer for this info. have a good day!!

TO REMOVE FRONT WHEEL BEARING.YOU NEED TO SAFELY RAISE SUPPORT VECHICLE ON JACK STANDS.MAKE SURE SITTING ON LEVEL SOLID GROUND.BEFORE RAISING VECHICLE OFF GROUND YOU NEED TO LOOSEN HALF SHAFT AXLE NUT JUST A LITTLE BECAUSE WHEEL IN THE AIR HARD TO LOOSEN AXLE NUT WHEN YOU HAVE HOLD THE WHEEL WHILE LOOSEN THE AXLE NUT WHICH IS TORQUE ON ABOUT 200 FT LBS.USING A SIX POINT AXLE SOCKET SOCKET SIZE COULD BE 34 OR 35 METRIC 1/2 INCH SOCKET.YOU NEED 1/2 INCH BREAKER BAR.ONCE YOU LOOSEN AXLE NUT A LITTLE THEN RAISE VECHICLE THEN REMOVE WHEEL.THEN FINISHING REMOVING AXLE NUT AND WASHER.THEN REMOVE THE CALIPER FROM THE STEERING KNUCKLE AND SUPPORT IT ASIDE USING A PIECE OF WIRE.REMOVE BRAKE ROTOR.THEN REMOVE THE 3 HUB BEARING ASSEMBLY BOLTS. USE A SWIVEL SOCKET GOING TO BE HARD TO REACH SPOT WITH A REGULAR SOCKET. REMOVE THE HALF SHAFT FROM THE HUB BEARING ASSEMBLY.REMOVE HUB AND BEARING ASSEMBLY. PUT EVERY THING BACK VISA VERSA. TORQUE HUB BEARING BOLTS TO 70 FT LBS. TORQUE AXLE NUT 284 FT LBS IF YOUR CAR IS 1998 MODEL AND TORQUE AXLE NUT 100 FT LBS FOR THE 1999 TO 2001 MODELS.THE WHEEL HAS TO BE ON THE GROUND JUST ENOUGH TO KEEP IT FROM TURNING.DONT LET ALL THE CAR WEIGHT DOWN UNTIL YOU HAVE TORQUE WHEEL TO THE RIGHT TORQUE.LET ME KNOW IF YOU HAVE ANY PROBLEMS.

jack up vehicle wheel in question and install jack stand.remove wheel. Unbolt 2 caliper bracket bolts and pry caliper assembly up off brake rotor and hang off to the side with bungee.remove rotor . remove large axle nut. From the back of the hub remove hub bolts most commonly 15mm.Using a slide hammer style wheel puller the hub can be removed. if all you have is a big hammer hit the hub back and forth side to side until it can be removed. Bolt in new hub assembly and torque bolts.Install axle nut and torque. install rotor and caliper. reinstall wheel and torque.

common hand tools and a torque wrench

The hub, bearing, and ABS sensor are a single unit on this vehicle. You need to remove the wheel, brake rotor & caliper [don't disconnect the brake hose from the caliper, just support it out of the way] and then remove the large nut that holds the axle shaft in the hub assembly. Once you have all this loose or removed you'll find that the hub is held on with 3 fairly large capscrews that come in from the backside of the steering knuckle that the hub attaches too. Assembly is just the reverse of the process. Make sure you tighten all the bolts and nuts securely with a torque wrench [I don't have the torque spec's here] I apply threadlocker to all of these bolts as they are vital to safety. I only use OEM hubs on these as I've had the best luck with them and the ABS sensors inside of them.

About an hour a side...This is the whole job and pictures....

The hub and wheel bearing unit is serviced as a complete assembly. Replacement of the front drive hub and bearing assembly can be done without having to remove the steering knuckle from the vehicle. However, if the hub/bearing assembly is frozen to the steering knuckle, removal of the steering knuckle is required.

1. Disconnect the negative battery cable.
   
2. Remove the cotter pin from the end of the stub axle. Remove the nut lock and spring washer. With the brakes applied, loosen, but do NOT remove the axle nut and washer with the vehicle still on the ground or damage to the wheel bearing will result.
   
3. Raise and safely support the vehicle. Remove the wheel.
   
4. Remove the front brake caliper assembly from the steering knuckle assembly and support from the strut assembly using a strong piece of wire.
   
1. Remove the front brake rotor from the hub/bearing assembly.
   
2. Remove the retaining nut and washer from the halfshaft stub axle.
   
3. Remove the ABS wheel speed sensor from the steering knuckle.
   
4. Remove the 4 hub and bearing assembly mounting bolts from behind the steering knuckle.
   
5. Remove the hub and bearing assembly from the steering knuckle.
   
5. To install:
   
   1. Thoroughly clean the mating surfaces of the steering knuckle and the hub and bearing assembly of any foreign material or nicks so the surfaces are clean and smooth.
      
   2. Install the new hub and bearing assembly and tighten the mounting bolts in a crisscross pattern to 45 ft. lbs. (65 Nm). Be sure the hub and bearing assembly is seated squarely against the front steering knuckle.
      
   3. Install the disc brake rotor.
      
   4. Install the brake caliper assembly onto the steering knuckle.
      
   5. Install the axle washer and nut. Tighten but do not torque.
      
   6. Install the ABS wheel speed sensor.
      
   7. Install the wheel and lug nuts. Torque the lug nuts, in sequence, to 95 ft. lbs. (129 Nm).
      
   8. Lower the vehicle. Do NOT roll the vehicle until the axle nut has been properly torqued or damage to the front wheel bearings will result.
      
   9. With the vehicle's brakes applied, torque the axle nut to 180 ft. lbs. (244 Nm). Install the spring washer, nut lock and a new cotter pin. Wrap the cotter pin prongs tightly around the axle nut lock.
      
   10. Reconnect the negative battery cable. Check the wheel alignment.
       

The hub/bearing assembly is attached to the steering knuckle with four bolts



Removing a hub/bearing assembly




If the hub/bearing is "frozen" to the steering knuckle, separate the ball joint and lightly tap on the hub/bearing from behind




The hub/bearing assembly should free itself from the steering knuckle

About $60 a hub.

Replacing the front wheel bearing/hubs can be a big job for the inexperianced. Briefly...
Remove tire/wheel
Remove brake caliper assembly, do not remove brake line.
Remove caliper bracket.
Remove brake rotor.
Unplug ABS sensor.
Remove the large axle nut.
Press axle out of bearing (may need special tool)
Remove the 3 bearing bolts and remove bearing.

its actually pretty easy if you have the basic tools needed and a little mechanical knowledge, because i dont think you can buy just the bearing at a auto parts store. they sell you the whole hub assembly which is great for the DIYer.

lift the car off the ground and block it from rolling and place a jack stand under it so it cant fall on anyone.


Wheel Bearings

• REMOVAL & INSTALLATION

Removal & Installation

These vehicles are equipped with sealed hub and bearing assemblies. The hub and bearing assemblies are non-serviceable. If the assembly is damaged, the complete unit must be replaced.

1. Before servicing the vehicle, refer to the precautions section.
2. Remove or disconnect the following:
   WARNING DO NOT allow the caliper to hang unsupported from the brake hose.
   
   
   Front wheel Halfshaft nut and washer Caliper from the steering knuckle and support it aside
   
   
   Brake rotor Anti-lock Brake System (ABS) connector, if equipped 3 hub/bearing assembly bolts Halfshaft from the hub/bearing assembly Hub/bearing assembly
   
   Fig. Exploded view of the front hub/bearing assembly
   
   

To install:
Install or connect the following:

Hub/bearing assembly onto the halfshaft, making sure the splines engage smoothly Hub/bearing assembly to the steering knuckle. Torque the bolts to 70 ft. lbs. (95 Nm). Anti-lock Brake System (ABS) connector, if equipped Brake rotor Caliper onto the steering knuckle. Torque the bolts to 38 ft. lbs. (51 Nm). Halfshaft nut. Torque the hub nut to 284 ft. lbs. (385 Nm) on nuts colored black, or 173 ft. lbs. (235 Nm) on gray colored nuts. Front wheel. Torque the nuts to 100 ft. lbs. (140 Nm).