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Removal & Installation: Thermostat: Removal

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NOTE: Thermostats MUST be replaced in pairs.
  1. Remove the air cleaner and the duct assembly. Partially drain the coolant. See DRAINING & FILLING COOLING SYSTEM  under ADJUSTMENTS & INSPECTIONS. Remove the surge tank.
  2. Disconnect the radiator hose from the thermostat housing. Remove the bolts attaching the thermostat housing to the thermostat. Remove the thermostat housing. Remove the thermostats. See Fig 1. Clean the gasket mating surfaces.
Fig 1: Identifying Thermostats And Components
G00307792Courtesy of GENERAL MOTORS CORP.
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