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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 972 (Engine Cooling System) >> Repair Instructions >> Engine Coolant Thermostat Replacement (LMM) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Drain the cooling system. Refer to Cooling System Draining and Filling (Vac-N-Fill)  or Cooling System Draining and Filling (Static Fill) .
  2. Remove the water outlet tube. Refer to Water Outlet Tube Replacement (LMM) .
  3. Remove the oil fill tube. Refer to Oil Filler Tube Replacement .
    4. Fig 1: Thermostat Replacement Components
    G00562086Courtesy of GENERAL MOTORS CORP.
  4. Remove the thermostat housing fasteners (1) and the thermostat housing (2).
  5. Remove the thermostats and seals (3).
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