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GMC K3500 Cooling System Switches

This page brings together cooling system switches for the GMC K3500, covering model years 1979–2000. The range includes engine coolant temperature switches, engine cooling fan switches, and auxiliary cooling fan switches — components that sit within the cooling circuit and signal the system to respond to temperature changes. Choose your model year above and this page keeps only the cooling system switches that fit your GMC K3500. Each listing is matched to our vehicle fitment data before it appears here.

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What's here for your GMC K3500

  • Engine Coolant Temperature Switches
  • Engine Cooling Fan Switches
  • Auxiliary Engine Cooling Fan Switches
  • Engine Cooling Fan Temperature Switches
  • Switch kits

The widest selection of cooling system switches for the GMC K3500 here comes from Standard Motor Products, Four Seasons, Hayden Automotive, and Dorman. Other categories GMC K3500 owners shop for: GMC K3500 Exhaust and Tail Pipes, GMC K3500 Brake Hardware and GMC K3500 Valve Train Parts, or browse all GMC K3500 parts and accessories.