OEM 2004 GMC Envoy Steering Knuckle

2004 GMC Envoy Steering Knuckle Parts and Q&A

• Q: How to replace the steering knuckle on a 4WD on 2004 GMC Envoy?

  A: Even though you're replacing the Steering Knuckle in your 4wd vehicle you must start by raising and supporting the vehicle followed by taking off the tire and wheel. Detach the wheel drive shaft nut before you support the lower Control Arm and throw the nut away. The wheel speed sensor harness requires disconnecting from the inner fender panel while also separating from the chassis harness before Brake Caliper Bracket removal. First disconnect the outer tie rod from the Steering Knuckle and remove upper Control Arm retaining nuts that hold the Ball Joint studs together before separating the lower Control Arm retaining nut. Use j 43631 Ball Joint remover (J 43631) to remove the lower Ball Joint from the Steering Knuckle before attaching the knuckle assembly to a bench for removal. Using the j 6627-a Ball Joint separator (J 6627-A) disassemble the Ball Joint followed by removal of the Wheel Hub and bearing assembly. Installation begins by assembling the Wheel Hub and bearing components although proper cleaning should occur of all grease and contaminants on the tapered sections of the upper Ball Joint and lower Ball Joint together with the Tie Rod End. Check the taper holes and mounting surfaces of the Steering Knuckle then replace the component when any tapered holes demonstrate elongation, out-of-round shape or damage. After connecting the lower Ball Joint to the Steering Knuckle install the retaining nut at 145 nm (107 ft. Lbs.) while the upper Ball Joint retention needs 75 nm (55 ft. Lbs.) for installation torques. Secure the outer tie rod to the Steering Knuckle followed by connecting the wheel speed sensor harness to both the chassis harness and the inner fender panel. After installing the Brake Caliper Bracket and wheel drive shaft nut, add new tire and wheel. Finish up by removing the Control Arm support then lowering the vehicle while checking wheel alignment.