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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 634 (Engine Cooling System) >> Repair Instructions >> Coolant Heater Replacement (Dealer Installation - 6.0L Engine) >> Dealer Installation Only

Dealer Installation Only

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    Fig 1: Identifying Oil Pan Skid Plate
    GM309158Courtesy of GENERAL MOTORS CORP.
  1. Drain the cooling system/engine block. Refer to Draining and Filling Cooling System .
  2. Raise and suitably support the vehicle. Refer to LIFTING & JACKING THE VEHICLE .
  3. Remove the oil pan skid plate bolts and plate.
    4. Fig 2: View Of Oil Cooler Hose Bracket Bolt & Adapter Bolts
    GM688324Courtesy of GENERAL MOTORS CORP.
  4. Remove the oil cooler hose bracket bolt (1).
  5. Remove the oil cooler hose adapter bolts (2).
  6. Remove and discard the oil cooler hose adapter gasket.
  7. Position the oil cooler hose adapter end out of the way.
    8. Fig 3: View of Coolant Heater
    GM786910Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE .
  8. Install the coolant heater in place of the drain plug.

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

    9. Fig 4: Identifying Coolant Heater Cord & Electrical Connector
    GM661139Courtesy of GENERAL MOTORS CORP.
    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.
  9. Push the engine coolant heater cord electrical connector (2) firmly into the coolant heater (1).
    10. Fig 5: View Of Coolant Heater Cord, Retainer & Bolts
    GM661277Courtesy of GENERAL MOTORS CORP.
    NOTE: The heater cord must not touch the engine, hot pipes, manifold, or any moving parts. Route the cord to the left front of the engine compartment securing with tie straps as necessary to prevent damage.
  10. Place the cord into position.
  11. Install the heater cord bolt and retainer.

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

    12. Fig 6: View Of Oil Cooler Hose Bracket Bolt & Adapter Bolts
    GM688324Courtesy 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 (2).

    Tighten:  Tighten the oil cooler hose adapter bolts to 12 N.m (106 lb in).

  15. Install the oil cooler hose bracket bolt (1).

    Tighten:  Tighten the oil cooler hose bracket bolt to 25 N.m (18 lb ft).

    16. Fig 7: Identifying Oil Pan Skid Plate
    GM309158Courtesy of GENERAL MOTORS CORP.
  16. Install the oil pan skid plate and bolts.

    Tighten:  Tighten the oil pan skid plate 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 .
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