2004 avalanche wheel bearing hub assembly will not come lose from steering knuckle

Removal

1. Raise and support the vehicle.
2. Remove the wheel and tire assembly.
3. Remove the brake caliper, caliper anchor, rotor and ABS wheel speed sensor.
4. Remove the cotter pin, nut retainer and axle hub nut.
5. Remove the hub/bearing mounting bolts from the back of the steering knuckle. Remove hub/bearing from the steering knuckle and off the axle shaft.

Installation

1. Install the hub/bearing to the knuckle.
2. Install the hub/bearing-to-knuckle bolts and tighten to specification.
3. Install the hub washer and nut. Tighten the hub nut to specification. Install the nut retainer and a new cotter pin.
4. Install the brake rotor, caliper anchor, caliper and ABS wheel speed sensor.
5. Install the wheel and tire assembly.
6. Remove the support and lower the vehicle.

Hub and Bearing Removal & Installation NOTE: The removal and installation of the wheel bearing and hub from the steering knuckle is only to be done with the steering knuckle removed from the vehicle
To Remove:

1. Remove the steering knuckle and hub and bearing assembly.
2. Remove a wheel lug stud from the hub flange using a C-clamp and Adapter Tool 4150A or equivalent.
3. Rotate the hub to align the removed lug stud with the notch in the bearing retainer plate. Use a proper C-clamp and adapter tool to press out one of the lug studs
   
   Rotate the hub in order to remove the lug stud
   
   
4. Rotate the hub so the stud hole is facing away from the brake caliper's lower rail on the steering knuckle.
5. Install ½ of a Bearing Splitter Tool 1130 or equivalent between the hub and the bearing retainer plate. The threaded hole in this ½ is to be aligned with the caliper rail on the steering knuckle.
6. Install the remaining pieces of the bearing splitter on the steering knuckle. Hand-tighten the nuts to hold the splitter in place on the knuckle. Proper installation of the bearing splitter
   
   
7. When the bearing splitter is installed, be sure the 3 bolts attaching the bearing retainer plate to the knuckle are contacting the bearing splitter. The bearing retainer plate should not support the knuckle or contact the splitter.
8. Place the steering knuckle in a hydraulic press, supported by the bearing splitter. Properly support the steering knuckle for hub and bearing removal
   
   
9. Position a driver on the small end of the hub. Using the press, remove the hub from the wheel bearing. The outer bearing race will come out of the wheel bearing when the hub is pressed out of the bearing.
10. Remove the bearing splitter tool from the knuckle.
11. Place the knuckle in a press supported by the press block. The blocks must not obstruct the bore in the steering knuckle so the wheel bearing can be pressed out of the knuckle. Place a driver on the outer race of the wheel bearing, and then press the bearing out of the knuckle.
12. Install the bearing splitter on the hub. The splitter is to be installed on the hub so it is between the flange of the hub and the bearing race on the hub. Place the hub, bearing race and splitter in a press. Use a driver to press the hub out of the bearing race.

To Install:

1. Use clean, dry cloth to wipe and grease or dirt from the bore of the steering knuckle.
2. Clean the rust preventative from the replacement wheel bearing using a clean, dry towel.
3. Place the new wheel bearing into the bore of the steering knuckle. Be sure the bearing is placed squarely into the bore. Place the knuckle in a press with a receiver tool, C-4698-2 or equivalent supporting the steering knuckle. Place a driver tool on the outer race of the wheel bearing. Press the wheel bearing into the steering knuckle until it is fully bottomed in the bore of the steering knuckle. NOTE: Only the original or original equipment replacement bolts should be used to mounting the bearing retainer to the knuckle. If a bolt requires replacement when installing the bearing retainer plate, be sure to get the proper type of replacement.
   
4. Install the bearing retainer plate on the steering knuckle. Install the 3 bearing retainer mounting bolts. Torque the bolts to 21 ft-lbs (28 Nm).
5. Install the removed wheel lug stud into the hub flange.
6. Place the hub with the lug stud installed, in a press supported by Adapter Tool C-4698-1 or equivalent. Press the wheel lug stud into the hub flange until it is fully seated against the back side on the hub flange.
7. Place the steering knuckle with the wheel bearing installed, in a press with special Receiver Tool MB-990799 or equivalent supporting the inner race of the wheel bearing. Place the hub in the wheel bearing, making sure it is square with the bearing. Press the hub into the wheel bearing until it is fully bottomed in the wheel bearing.
8. Install the steering knuckle and the wheel.
9. Check and/or adjust the front alignment.

These are the steps you need to follow for this procedure if you have the proper tools.

1. Remove front caliper assembly and rotor from the steering knuckle as outlined under "Caliper, Replace" in the "Disc Brake" unit repair section.
2. Remove hub and bearing to stub axle retaining nut.
3. Disconnect hub bolts then remove hub and bearing assembly from steering knuckle by sliding it straight off end of stub axle. If metal seal on hub and bearing assembly is seized to steering knuckle and becomes dislodged on hub and bearing assembly during removal, or when removing hub and bearing, the finger disc on hub becomes damaged, hub and bearing assembly must be replaced.
4. If hub and bearing will not slide out of knuckle, insert a prybar between hub and steering knuckle and gently pry hub and bearing from knuckle.
5. Tighten stub shaft nut, lower vehicle and with brakes applied, torque stub shaft nut to 70 - 90 ft. lbs.

Front (4 Wheel Drive) To Remove:

1. Raise and support the vehicle
2. Remove or disconnect the following:
   • Tire and wheel assembly
   • Rotor (See: Disc Brake Rotor)
   • Wheel speed sensor and brake hose mounting bracket bolt from the steering knuckle
   • Electrical connection for the wheel speed sensor
   • Front drive halfshaft assembly (See: Halfshaft)
   • Hub and bearing assembly mounting bolts 4WD front hub
     
     
   • Hub and bearing assembly

To Install:

1. Clean all corrosion or contaminates from the steering knuckle bore and the hub and bearing assembly
2. Lubricate the steering knuckle bore with wheel bearing grease or the equivalent
3. Install or connect the following:
   • Hub and bearing assembly
   • Hub and bearing assembly mounting bolts and tighten the hub to knuckle bolts; Torque to: 133 ft. lbs. (180 Nm)
   • Front drive halfshaft assembly (See: Halfshaft)
   • Electrical connection for the wheel speed sensor
   • Wheel speed sensor and brake hose mounting bracket bolt to the steering knuckle and tighten the bolt; Torque to: 106 inch. lbs. (12 Nm)
   • Rotor (See: Disc Brake Rotor
   • Tire and wheel assembly
   Wheel lug nut tightening sequence
   
   
4. Torque the lug nuts to specification
5. Test drive the vehicle to confirm the repairs

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.

1. Raise and support the vehicle.
2. Remove or disconnect the following:
   
   Tire and wheel assembly Caliper and rotor Wheel speed sensor and brake hose mounting bracket bolt from the steering knuckle Electrical connection for the wheel speed sensor Front drive halfshaft assembly on four wheel drive models Hub and bearing assembly mounting bolts Hub and bearing assembly O-ring seal from the steering knuckle bore (2500 series)
   
3. Clean and inspect the O-ring seal

To install:

1. Clean all corrosion or contaminates from the steering knuckle bore and the hub and bearing assembly.
2. Install the O-ring to the steering knuckle (2500 series).
3. Lubricate the steering knuckle bore with wheel bearing grease or the equivalent.
4. Install or connect the following:
   
   Hub and bearing assembly Hub and bearing assembly mounting bolts. Tighten the bolts to 133 ft. lbs. (180 Nm). Front drive halfshaft assembly on four wheel drive models Electrical connection for the wheel speed sensor Wheel speed sensor and brake hose mounting bracket bolt to the steering knuckle. Tighten to 106 inch lbs. (12 Nm). Rotor Tire and wheel assembly.

You can go to autozone.com and register for free online repair manual with everything you need.

2003 Hummer H2 V8-6.0L VIN U
Wheel Bearing: Service and Repair
WHEEL HUB, BEARING, AND SEAL REPLACEMENT
REMOVAL PROCEDURE
NOTE: Never place vehicle on the ground with the halfshaft removed or the halfshaft nut torqued improperly. Otherwise, bearing seals may become
dislodged causing premature wear and/or damage to the hub and bearing assembly.
1. Raise and support the vehicle. Refer to Vehicle Lifting.
2. Remove the tire and wheel.
3. Remove the rotor.
4. Remove the wheel speed sensor and brake hose mounting bracket bolt from the steering knuckle.
5. Disconnect the electrical connection for the wheel speed sensor.
6. Remove the wheel driveshaft nut retaining cover.
7. Remove the wheel driveshaft assembly retaining nut and washer from the wheel driveshaft assembly.
Disengage the wheel driveshaft from the wheel hub and bearing.
8. Remove the wheel hub and bearing mounting bolts.
9. Remove the wheel hub and bearing and splash shield from the vehicle.
10. Remove the O-ring seal from the steering knuckle bore.
11. Remove the wheel speed sensor from the wheel hub and bearing.
12. Clean and inspect the O-ring seal.
13. Replace the seal it the following conditions exist:
- Nicks
- Cuts
- Dry or brittle
- Compression set
INSTALLATION PROCEDURE
1. Clean all corrosion or contaminates from the steering knuckle bore and the hub and bearing assembly.
2. Lubricate the steering knuckle bore with wheel bearing grease or the equivalent.
3. Install the O-ring to the steering knuckle.
NOTE: Refer to Fastener Notice in Service Precautions.
4. Install the wheel speed sensor to the wheel hub and bearing.
Tighten
Tighten the sensor mounting bolt to 18 N.m (13 lb ft).
5. Install the wheel hub and bearing and splash shield to the vehicle.
6. Install the wheel hub and bearing mounting bolts.
Tighten
Tighten the wheel hub to knuckle bolts to 180 N.m (133 lb ft).
7. Install the nut and washer retaining the wheel drive shaft assembly to the wheel hub and bearing.
Tighten
Tighten the nut to 210 N.m (155 lb ft).
8. Connect the electrical connection for the wheel speed sensor.
9. Install the wheel speed sensor and brake hose mounting bracket bolt to the steering knuckle.
Tighten
Tighten the bolt to 12 N.m (106 lb in).
10. Install the rotor.
11. Install the tire and wheel.
12. Lower the vehicle.

Here's the steps....getting some pics for you....hang on a minute or two.

Front Hub Removal & Installation To Remove:

1. Remove steering knuckle.
2. Using a suitable slap hammer, remove wheel hub assembly.
3. Using a suitable bearing press, remove outer bearing, oil seal, outer bearing race and preload spacer.
4. Remove inner oil seal, inner wheel bearing and inner bearing race.

NOTE: It is not necessary to remove dust cover (back plate).
To Install:

1. Using a suitable bearing press, install bearing races in steering knuckle.
2. Pack the bearings and hub area with lithium grease.
3. Install inner bearing in steering knuckle.
4. Lubricate lip of NEW inner seal and press seal into knuckle.
5. Install preload spacer into bore.
6. Install outer bearing into bore.
7. Lubricate lip of NEW outer seal and press seal into knuckle.
8. Using an appropriate tool, support inner wheel bearing and press wheel hub into knuckle with a force of 2500kg.
9. Install NEW inner seal.
10. Install knuckle assembly.

1. Raise and safely support the vehicle.
2. Remove the front tire and wheel.
3. Remove the steering knuckle assembly, as described previously.
4. Remove the bolts attaching the hub/bearing assembly to the steering knuckle.
5. Remove the hub/bearing assembly from the front of the steering knuckle. The bolt-in front wheel bearing used on the vehicle is transferable to a replacement steering knuckle, if the bearing is in serviceable condition. If the bearing will not come out of the steering knuckle, it can be tapped out using a soft-faced hammer.
6. 

1. Thoroughly clean all parts, including the hub/bearing assembly mounting surfaces on the steering knuckle.
2. Install the replacement hub/bearing assembly onto the steering knuckle, aligning the bolt holes of the bearing flange to the knuckle.
3. Install the attaching bolts and tighten evenly to make sure the bearing is square to the face of the steering knuckle. Tighten the attaching bolts to 80 ft. lbs. (110 Nm) on Cirrus, Stratus, Sebring convertible and Breeze, or 65 ft. lbs. (88 Nm) on Sebring coupe and Avenger.
4. Install the steering knuckle assembly, as previously described.
5. Install the tire and wheel.
6. Lower the vehicle and check for proper operation.

Service and Repair

1. Remove front hub/steering knuckle assembly from vehicle.
2. Position front hub/steering knuckle assembly on a press and press front hub out of steering knuckle using a suitable removal tool.
3. Remove E-clip from steering knuckle, then position steering knuckle onto a press.
4. Using a suitable bearing remover, press bearing out of steering knuckle.
5. Reverse procedure to install.