GM Full-Size Trucks 1980-1987 Repair Guide

Wheels

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REMOVAL




CAUTION
All suspension and steering fasteners are important attaching parts in that they could affect the performance of vital components and systems, and/or could result in major repair expense. They must be replaced with one of the same part number or with an equivalent part if replacement becomes necessary. Do not use a replacement part of lesser quality or substitute design. Torque values must be used as specified during reassembly to assure proper retention of these parts. Observe all nut and bolt torque specifications.

See Figure 1

  1. Raise the truck on a jack just enough to take up the weight of the truck, leaving the tire on the ground.
  2.  
  3. Using a lug wrench or breaker bar and socket, break loose the lug nuts in a crisscross pattern.
  4.  
  5. Raise and safely support the truck, remove the lug nuts and remove the wheel(s).
  6.  



Click image to see an enlarged view

Fig. Fig. 1: Note that the center cap does not need to be removed in order to remove the tire and wheel assembly

INSTALLATION



See Figure 2

Single Wheel
  1. Lift the wheel onto the lugs.
  2.  



Click image to see an enlarged view

Fig. Fig. 2: Wheel lug nut tightening sequence

  1. Snug down the topmost nut, then snug down the rest of the nuts in a crisscross pattern.
  2.  
  3. When all nuts are snugged, torque them in a crisscross pattern to the specifications listed at the end of this procedure.
  4.  

Dual Wheels
  1. Install the inner and outer wheels, and clamp ring. Be sure that the pins on the clamp ring face outwards.
  2.  
  3. Install the nuts snugly, in a crisscross pattern. When all the lugs are snugged, tighten them in the sequence shown to the specifications at the end of this procedure.
  4.  

Wheel Nut Torque


All K series trucks with six 7 /16 inch bolts, tighten to 90 ft. lbs. (120 Nm).
 
All C10 series trucks with five 1 /2 inch bolts, tighten to 100 ft. lbs. (140 Nm).
 
All single wheel C20, C30 and K30 series trucks with five 9 /16 inch bolts, tighten to 120 ft. lbs. (160 Nm).
 
All dual wheeled C30 and K30 series trucks with eight 9 /16 inch bolts, tighten to 140 ft. lbs. (190 Nm).
 
All dual wheeled C30 and K30 series trucks with ten 5 /8 inch bolts, tighten to 200 ft. lbs. (270 Nm).
 

 
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