GM Full-Size Trucks 1980-1987 Repair Guide

Coil Spring

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REMOVAL & INSTALLATION



See Figures 1, 2, 3, 4 and 5

  1. Raise and support the truck under the frame rails. The control arms should hang free.
  2.  
  3. Disconnect the shock absorber at the lower end and move it aside. Disconnect the stabilizer bar from the lower control arm.
  4.  



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Fig. Fig. 1: The lower control arm attaching points



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Fig. Fig. 2: Disconnect the shock absorber lower mount and reposition it

  1. Support the cross-shaft and install a spring compressor or chain the spring to the control arm as a safety precaution.
  2.  
  3. Raise the jack to remove the tension from the lower control arm cross-shaft. Remove the two U-bolts securing the cross-shaft to the crossmember.
  4.  


CAUTION
The cross-shaft and lower control arm keeps the coil spring compressed. Use care when you lower the assembly.



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Fig. Fig. 3: The cross-shaft bolts and bushings do not have to be removed in order to lower the control arm assembly and remove the coil spring from the vehicle

  1. Slowly release the jack and lower the control arm until the spring can be removed. Be sure that all compression is relieved from the spring.
  2.  



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Fig. Fig. 4: Front coil spring removal showing spring compressor. Make sure the fork in the top of the spring compressor is in position whenever the tool is used



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Fig. Fig. 5: Spring compressed and ready to install

  1. Remove the spring.
  2.  
  3. Installation is the reverse of removal, with the following recommendations: Position the control arm cross-shaft on the crossmember and install the U-bolts. Be sure that the front indexing hole in the cross-shaft is aligned with the crossmember attaching saddle stud.
  4.  
  5. Have the front suspension alignment checked. Torque the U-bolts to 110 ft. lbs. on 3 /4 and 1 ton models; all other trucks 85 ft. lbs.
  6.  

 
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