GM Full-Size Trucks 1980-1987 Repair Guide

Radiator

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All pick-up trucks are equipped with cross-flow type radiators.

REMOVAL & INSTALLATION



See Figures 1, 2, 3, 4, 5, 6 and 7

  1. Drain the radiator by opening the drain cock.
  2.  


CAUTION
When draining the coolant, keep in mind that cats and dogs are attracted by the ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

  1. Disconnect the hoses and automatic transmission cooler line, if equipped. Plug the cooler lines to prevent system contamination or excessive fluid loss. Diesels should be equipped with both transmission cooler and oil cooler lines.
  2.  
  3. Disconnect the coolant recovery system hose.
  4.  



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Fig. Fig. 1: If equipped, disconnect the automatic transmission cooler lines from the radiator using a line wrench



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Fig. Fig. 2: Disconnect the coolant recovery tank hose from the radiator

  1. If the vehicle is equipped with a fan shroud, detach the shroud and hang it over the fan to provide clearance. If equipped with a 2-piece shroud, the upper half may be removed for additional access.
  2.  
  3. On 6 cylinder engines, remove the finger guard.
  4.  



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Fig. Fig. 3: Remove the bolts attaching the radiator shroud to the radiator



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Fig. Fig. 4: If the vehicle is equipped with a 2-piece shroud, the upper half may be removed by loosening the retainers

  1. Remove the mounting panel from the radiator support and remove the upper mounting pads.
  2.  
  3. Lift the radiator up and out of the truck. Lift the shroud out if necessary.
  4.  



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Fig. Fig. 5: Remove the radiator upper mounting panel retainers in order to remove the radiator

  1. Reverse the above to install. Fill the cooling system and check the automatic transmission fluid level, and run the engine, checking for leaks.
  2.  



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Fig. Fig. 6: Radiator mounting



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Fig. Fig. 7: Coolant recovery tank

 
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