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Home >> Chevrolet >> 2004 >> Avalanche 2500 >> Repair and Diagnosis >> External Pages >> Different car >> Section 412 (Engine Cooling System) >> Repair Instructions >> Coolant Heater Replacement (4.8L, 5.3L, and 6.0L Engines) >> Installation Procedure

Installation Procedure

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    Fig 1: View Of Coolant Heater At Engine Block (4.8L, 5.3L & 6.0L)
    GM661276Courtesy of GENERAL MOTORS CORP.
  1. If reusing the old coolant heater, apply thread sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent to the threads.
    2. 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).

    3. Fig 2: Identifying Coolant Heater Cord & Electrical Connector
    GM661139Courtesy of GENERAL MOTORS CORP.
  3. Connect the coolant heater electrical connector (2).
    4. Fig 3: View Of Oil Cooler Hose Adapter, Bolts & Gasket
    GM846669Courtesy 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).

    8. Fig 4: Identifying Oil Pan Skid Plate
    GM309158Courtesy 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 .
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