GM S10/S15/Sonoma Pick-Ups 1982-1993 Repair Manual

Rear Cables

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REMOVAL & INSTALLATION



See Figures 1, 2, 3 and 4

  1. Raise and support the rear of the vehicle safely using jackstands.
  2.  
  3. Remove the rear tire and wheel assembly, the matchmark and remove the brake drum.
  4.  

The parking brake equalizer threads will often rust in service making adjustment or removal difficult. If necessary, spray a penetrating lubricant on the nut and equalizer threads, then allow time for the lubricant to work.

  1. Under the left-center of the vehicle, loosen the nut on the cable equalizer assembly.
  2.  
  3. Separate the cable from the equalizer.
  4.  



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Fig. Fig. 1: Common rear parking brake cable mounting

  1. If equipped, release the rear cable retainer from the frame rail.
  2.  
  3. Remove the brake shoes and disconnect the parking brake cable from the shoe lever.
  4.  
  5. Remove the cable retainer from the backing plate by squeezing all of the retainer fingers and pulling the cable/retainer out of the plate. One easy way of accomplishing this is to position a box wrench (which is slightly smaller than the cable retainer) over the retainer to squeeze the fingers, then gently tap the wrench with a hammer to free the cable.
  6.  
  7. If equipped, remove the cable bolt and clip from the frame.
  8.  
  9. Remove the cable from the vehicle.
  10.  

To install:
  1. Position the cable under the vehicle and insert it through the brake backing plate. Seat the retainer on the plate making sure all of the fingers are locked in position. Route the cable and, if equipped, secure the frame retainer in the same manner.
  2.  
  3. Install the brake shoes, attaching the cable to the parking brake lever.
  4.  
  5. When installing the cable, attach it to the brake shoe lever and assemble the brakes. Before installing the drums, pull the cable by hand and watch the parking brake action for smooth operation.
  6.  
  7. Align and install the brake drum, then install the tire and wheel assembly.
  8.  
  9. If equipped, install the retaining clip and bolt. Tighten the bolt to 13 ft. lbs. (17 Nm).
  10.  
  11. Properly adjust the parking brake cable. For details, please refer to the procedure located later in this section.
  12.  
  13. Remove the jackstands and carefully lower the vehicle.
  14.  



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Fig. Fig. 2: A pair of vise grips are handy when disconnecting the cable from the shoe lever



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Fig. Fig. 3: To release the cable retainer, position a box wrench over the retainer in order to squeeze the fingers



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Fig. Fig. 4: Gently tap on the wrench with a hammer to free the cable and retainer from the backing plate

ADJUSTMENT



See Figures 5 and 6

The parking brake cables MUST be adjusted any time one of the cables have been disconnected or replaced. Another indication of a need for cable adjustment is if under heavy foot pressure the pedal travel is less than 9 ratchet clicks or more than 13. Remember that the brake shoes must be properly adjusted before attempting to adjust the parking brake cable.



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Fig. Fig. 5: Parking brake adjustment

Before adjusting the parking brakes, check the condition of the brake shoes and components; replace any necessary parts.

  1. Block the front wheels.
  2.  
  3. Raise and support the rear of the vehicle safely using jackstands.
  4.  

The parking brake equalizer threads will often rust in service making adjustment or removal difficult. If necessary, spray a penetrating lubricant on the nut and equalizer threads, then allow time for the lubricant to work.

  1. Under the left-center of the vehicle, loosen the nut on the cable equalizer assembly.
  2.  
  3. Set the parking brake pedal to the appropriate number of clicks:
    1. On 2wd models from 1982-84- set the pedal on the 8th click
    2.  
    3. On 2wd models from 1985-5- set the pedal on the 2nd click.
    4.  
    5. On 4wd models from 1983-84- set the pedal on the 10th click.
    6.  
    7. On 4wd models from 1985-5- set the pedal on the 3rd click.
    8.  

  4.  
  5. Tighten the cable equalizer nut until the rear wheel cannot be turned forward by hand without excessive force.
  6.  



Click image to see an enlarged view

Fig. Fig. 6: Be careful when attempting to turn the equalizer nut, rusted threads may release without warning, be sure to lubricate the threads

  1. Loosen the equalizer nut until there is just moderate drag when the rear wheels are rotated forward.
  2.  
  3. Release the parking brake and verify that there is NO brake drag in either direction.
  4.  
  5. If equipped, tighten the equalizer locknut.
  6.  
  7. Remove the jackstands and carefully lower the vehicle.
  8.  

 
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