GM Full-Size Trucks 1988-1998 Repair Information

Steering Knuckle

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REMOVAL & INSTALLATION



See Figures 1 and 2



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the steering knuckle and components-R-Series

  1. Raise and support the front end on jackstands.
  2.  
  3. Remove the wheels.
  4.  
  5. Dismount the caliper and suspend it out of the way without disconnecting the brake lines.
  6.  
  7. Remove the hub/rotor assembly.
  8.  
  9. Unbolt the splash shield and discard the old gasket.
  10.  
  11. Using a ball joint separator, disconnect the tie rod end from the knuckle.
  12.  
  13. Position a floor jack under the lower control arm, near the spring seat. Raise the jack until it just takes up the weight of the suspension, compressing the spring. Safety-chain the coil spring to the lower arm.
  14.  
  15. Remove the upper and lower ball joint nut.
  16.  
  17. Using tool J-23742, or equivalent, break loose the upper ball joint from the knuckle.
  18.  
  19. Raise the upper control arm just enough to disconnect the ball joint.
  20.  
  21. Using the afore-mentioned tool, break loose the lower ball joint.
  22.  
  23. Lift the knuckle off of the lower ball joint.
  24.  
  25. Inspect and clean the ball stud bores in the knuckle. Make sure that there are no cracks or burrs. If the knuckle is damaged in any way, replace it.
  26.  
  27. Check the spindle for wear, heat discoloration or damage. If at all damaged, replace it.
  28.  

To install:

Installation is the reverse of removal but please note the following important steps.

  1. Maneuver the knuckle onto both ball joints and tighten the nuts to specifications.
  2.  
  3. Install a new splash shield gasket and tighten the shield bolts to 10 ft. lbs. (14 Nm) on R-series vehicles. On C-series vehicles, tighten the bolts to 12 ft. lbs. (16 Nm) on 1988-90 models; 19 ft. lbs. (26 Nm) on 1991-98 models.
  4.  



Click image to see an enlarged view

Fig. Fig. 2: Locating the seal on the yoke-C-Series

 
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