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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1138 (Engine Cooling System) >> Repair Instructions >> Engine Coolant Thermostat Replacement (LY7, LLT) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View of Thermostat Assembly
    GM1979701Courtesy of GENERAL MOTORS CORP.
  1. Install the thermostat (2) with a NEW thermostat seal (3).
    2. NOTE: Refer to Fastener Notice .
  2. Install the thermostat bolts (1).

    Tighten:  Tighten the thermostat bolts to 10 N.m (89 lb in).

    3. Fig 2: View Of Coolant Inlet Pipe Bolt/Fastener Locations
    GM887731Courtesy of GENERAL MOTORS CORP.
  3. Install the coolant pipe (4), NEW seal, and fasteners (2 and 7). Refer to Engine Coolant Inlet Pipe Replacement .
  4. Connect the surge tank outlet pipe to the thermostat. Refer to Radiator Surge Tank Outlet Hose/Pipe Replacement (LLT)  or Radiator Surge Tank Outlet Hose/Pipe Replacement (LY7/LLT) .
  5. Install the upper intake manifold. Refer to Upper Intake Manifold Replacement (LP1, LY7) .
  6. Fill the cooling system. Refer to Cooling System Draining and Filling (GE 47716)  or Cooling System Draining and Filling (Static Fill) .
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