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Auxiliary Hot Water By-Pass Valve: Installation

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the heater hoses to the engine to the hot water bypass valve. See Fig 1. Install the bypass valve to the heater assembly.
  2. Install the bolt that retains the valve to the heater assembly. Install the heater inlet pipe and the outlet pipe to the bypass valves.
  3. Connect the vacuum hose to the valve. Connect the electrical connector to the valve. Refill the cooling system. Install the upper fan shroud. Install the air cleaner.
Fig 1: Identifying Coolant Bypass Valve
G00168436Courtesy of GENERAL MOTORS CORP.
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