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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 >> Hot Water Bypass Valve Replacement (W/C36) >> Installation Procedure

Installation Procedure

  1. Install the water bypass valve to the heater assembly.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
    Fig 1: Installing Hot Water Bypass Valve (W/C36)
    G01645654Courtesy of GENERAL MOTORS CORP.
  2. Install the bolt (3) that retains the water bypass valve to the heater assembly.

    Tighten 

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

  3. Install the auxiliary heater outlet hose (5) to the water bypass valve.
  4. Using the J 38185,  reposition the auxiliary heater outlet hose clamp to the water bypass valve.
  5. Install the auxiliary heater outlet hose (10) to the water bypass valve.
  6. Using the J 38185,  reposition the auxiliary heater outlet hose clamp (6) to the water bypass valve.
  7. Install the heater outlet hose (4) to the water bypass valve.
  8. Using the J 38185,  reposition the heater outlet hose clamp to the water bypass valve.
  9. Install the heater inlet hose (3) to the water bypass valve.
  10. Using the J 38185,  reposition the heater inlet hose clamp to the water bypass valve.
  11. Install the heater outlet hose (7) to the water bypass valve.
  12. Using the J 38185,  reposition the heater inlet hose clamp to the water bypass valve.
  13. Install the heater inlet hose (8) to the water bypass valve.
  14. Using the J 38185,  reposition the heater outlet hose clamp to the water bypass valve.
  15. Connect the vacuum hose to the water bypass valve.
  16. Fill the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM in Engine Cooling.
  17. Install the upper fan shroud. Refer to FAN SHROUD REPLACEMENT - UPPER in Engine Cooling.
  18. Install the air cleaner. Refer to AIR CLEANER ASSEMBLY in Removal & Installation.
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