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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 (Dealer Installation - 6.0L Engine) >> Dealer Installation Only

Dealer Installation Only

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  1. Drain the cooling system/engine block. Refer to DRAINING AND FILLING COOLING SYSTEM  .
  2. Raise and suitably support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
  3. Remove the oil pan skid plate bolts and plate.
    Fig 1: Removing Oil Pan Skid Plate Bolts And Plate
    G02117836Courtesy of GENERAL MOTORS CORP.
  4. Remove the oil cooler hose bracket bolt.
  5. Remove the oil cooler hose adapter bolts.
  6. Remove and discard the oil cooler hose adapter gasket.
  7. Position the oil cooler hose adapter end out of the way.
    Fig 2: Positioning Oil Cooler Hose Adapter End Out Of Way
    G02117837Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  8. Install the coolant heater in place of the drain plug.

    Tighten 

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

    Fig 3: Installing Coolant Heater In Place Of Drain Plug
    G02117838Courtesy of GENERAL MOTORS CORP.
  9. Push the engine coolant heater cord electrical connector (2) firmly into the coolant heater (1).

    Important:  The engine coolant heater cord must not touch the engine, hot pipes, manifold, or any moving parts. Always keep the electrical cord neatly rolled up with the end of the cord tucked in the center of the coil and secured in place.

    Fig 4: Pushing Engine Coolant Heater Cord Electrical Connector
    G02117839Courtesy of GENERAL MOTORS CORP.
  10. Place the cord into position.
  11. Install the heater cord bolt and retainer.

    Tighten 

    Tighten the bolt to 8 N.m (71 lb in).

    Fig 5: Placing Cord Into Position
    G02117840Courtesy of GENERAL MOTORS CORP.
  12. Position the oil cooler hose adapter.
  13. Install a NEW oil cooler hose adapter gasket.
  14. Install the oil cooler hose adapter bolts.

    Tighten 

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

  15. Install the oil cooler hose bracket bolt.

    Tighten 

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

    Fig 6: Installing Oil Cooler Hose Adapter
    G02117841Courtesy of GENERAL MOTORS CORP.
  16. Install the oil pan skid plate and bolts.

    Tighten 

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

  17. Lower the vehicle.
  18. Fill the cooling system/engine block. Refer to DRAINING AND FILLING COOLING SYSTEM  .
    Fig 7: Installing Oil Pan Skid Plate And Bolts
    G02117842Courtesy of GENERAL MOTORS CORP.
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