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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 688 (Engine Cooling System) >> Repair Instructions >> Thermostat Replacement (6.6L Engine) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the 2 thermostats with the seals to the thermostat housing. The rear thermostat (4) has 2 vent valves. Install with the vent valves towards the rear of engine.
    Fig 1: Identifying Thermostats
    G01658073Courtesy of GENERAL MOTORS CORP.
  2. Install the thermostat housing cover with a new gasket. Tighten the thermostat housing cover bolts to 21 N.m (15 lb ft).
  3. Install the fuel line bracket bolt. Tighten the fuel line bracket and bolt to 21 N.m (1 lb ft).
  4. Install the water outlet tube.
  5. Fill the engine coolant. Refer to Draining & Filling Cooling System .