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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1284 (Engine Cooling System) >> Repair Instructions >> Engine Coolant Thermostat Replacement (LMM) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Thermostat Replacement Components
G00562086Courtesy of GENERAL MOTORS CORP.
  1. Install the thermostats and seals (3).

    The rear thermostat has 2 vent valves. Install the vent valves towards the rear of the engine, as shown.

    CAUTION: Refer to Fastener Caution
  2. Position the thermostat housing (2) and tighten the fasteners (1) to 21 N.m (15 lb ft). 
  3. Install the oil fill tube. Refer to Oil Filler Tube Replacement .
  4. Install the water outlet tube. Refer to Water Outlet Tube Replacement (LMM) 
  5. Fill the cooling system. Refer to Cooling System Draining and Filling (Vac-N-Fill)  or Cooling System Draining and Filling (Static Fill)