OEM GMC Sierra 3500 Steering Knuckle

GMC Sierra 3500 Steering Knuckle Parts and Q&A

• Knuckle, Passenger Side
  25850471
  Q: How to replace the front steering knuckle on a 4WD on GMC Sierra 3500?

  A:

  Start the steerable knuckle replacement by first lifting the 4wd vehicle before supporting it while removing the tire and wheel. The next step involves removing the Wheel Hub combined with the bearing assembly. Lift the lower Control Arm using a suitable jack while you disconnect the outer tie rod from the Steering Knuckle. Begin by removing the brake hose bracket retaining bolt from the Steering Knuckle followed by removing the upper Control Arm retaining nut. The Ball Joint separation process starts through joint removal operation using j 43631 Ball Joint remover (J 43631) and j 45851 Ball Joint separator protector adapters (J 45851) on the Steering Knuckle's upper Ball Joint. Unload the lower Control Arm retaining nut before using the same tools to break apart the lower Ball Joint. Follow Steering Knuckle removal by cleaning the tapered parts and threads of the upper Ball Joint, lower Ball Joint and Tie Rod End free from grease and contaminants. Steering Knuckle replacement is required when inspection reveals elongated, out-of-round or damaged mounting surfaces or taper holes. Attach the new Steering Knuckle followed by installing the lower Ball Joint then torque its retaining nut to 100 nm (74 ft. Lbs.). Fasten the upper Ball Joint retaining nut while maintaining a torque of 50 nm (37 ft. Lbs.). Reinstall the brake hose and its mounting bracket retaining bolt while tightening it to 9 nm (80 inch lbs.). Next, connect the outer tie rod to the Steering Knuckle. Install first the Wheel Hub and bearing assembly and then replace the tire and wheel. Depress the lower Control Arm support before lowering the vehicle to perform alignment checks.
• Knuckle, Driver Side
  25850470
  Q: How to replace the steering knuckle in a rear wheel steering system on GMC Sierra 3500?

  A:

  A rear wheel steering system requires you to remove the upper Ball Joint before moving on to the lower Ball Joint and finally the Wheel Hub and bearing. Using the universal steering linkage puller (J 24319-B) disconnect the outer tie rod from the Steering Knuckle after removing the outer tie rod retaining nut. Begin installation by first removing the forked retaining bolt that retains the park brake cable on the knuckle then extract the knuckle from the vehicle. First position the Steering Knuckle onto the vehicle before installing both upper and lower ball joints. Secure the Steering Knuckle's park brake cable retaining bolt while making sure the torque reaches 65 nm (48 ft. Lbs.). After the Wheel Hub and bearing installation you must tighten the outer tie rod retaining nut to 55 nm (40 ft. Lbs.). Install the tire on the wheel before performing final four wheel alignment.