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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 800 (Engine Cooling System) >> Repair Instructions >> Coolant Heater Replacement (4.8L, 5.3L, and 6.0L Engines) >> Installation Procedure

Installation Procedure

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  1. If reusing the old coolant heater, apply thread sealant GM P/N 12346004

    (Canadian P/N 10953480), or equivalent to the threads.

    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  2. Install the coolant heater to the engine block.

    Tighten 

    Tighten the coolant heater to 50 N.m (37 lb ft).

    Fig 1: Installing Coolant Heater To Engine Block
    G02117847Courtesy of GENERAL MOTORS CORP.
  3. Connect the coolant heater electrical connector (2).
    Fig 2: Connecting Coolant Heater Electrical Connector
    G02117848Courtesy of GENERAL MOTORS CORP.
  4. Position the oil cooler hose adapter end.
  5. Install a NEW oil cooler hose adapter gasket.
  6. Install the oil cooler hose adapter bolts.

    Tighten 

    Tighten the bolts to 12 N.m (106 lb in).

  7. Install the oil cooler hose bracket bolt.

    Tighten 

    Tighten the bolt to 25 N.m (18 lb ft).

    Fig 3: Installing Oil Cooler Hose Adapter
    G02117849Courtesy of GENERAL MOTORS CORP.
  8. Install the oil pan skid plate and bolts.

    Tighten 

    Tighten the bolts to 20 N.m (15 lb ft).

  9. Lower the vehicle.
  10. Fill the cooling system/engine block. Refer to DRAINING AND FILLING COOLING SYSTEM  .
    Fig 4: Installing Oil Pan Skid Plate And Bolts
    G02117850Courtesy of GENERAL MOTORS CORP.
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