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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating, Ventilation And Air Conditioning >> Repair Instructions >> Coolant Bypass Valve Replacement - Auxiliary >> Installation Procedure

Installation Procedure

  1. Install the auxiliary coolant bypass valve (1).
    Fig 1: Installing Auxiliary Coolant Bypass Valve
    G01645678Courtesy of GENERAL MOTORS CORP.
  2. Install the auxiliary outlet heater hose (2) to the auxiliary coolant bypass valve.
  3. Using the J 38185,  reposition the auxiliary inlet heater hose clamp to the auxiliary coolant bypass valve.
  4. Install the auxiliary heater outlet hose (10) to the auxiliary coolant bypass valve.
  5. Using the J 38185,  reposition the auxiliary heater hose clamp to the auxiliary coolant bypass valve.
  6. Install the auxiliary coolant bypass valve to the heater assembly.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  7. Install the bolt that retains the auxiliary coolant bypass valve to the heater assembly.

    Tighten 

    Tighten the bolt to 4 N.m (35 lb in).

  8. Connect the vacuum hose to the auxiliary coolant bypass valve.
  9. Connect the electrical connector to the auxiliary coolant bypass valve.
  10. Fill the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM in Engine Cooling.
  11. Install the upper fan shroud. Refer to FAN SHROUD REPLACEMENT - UPPER in Engine Cooling.
  12. Install the air cleaner. Refer to AIR CLEANER ASSEMBLY in Removal & Installation.
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