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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1571 (Engine Cooling System) >> Repair Instructions >> Engine Coolant Crossover Pipe Replacement (3.5L (L66)) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Crossover Pipe
    GM1237580Courtesy of GENERAL MOTORS CORP.
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (2.2L (L61) and 3.5L (L66)) or Battery Negative Cable Disconnection and Connection (2.4L (LAT)) .
  2. Remove the battery. Refer to Battery Replacement (2.2L (L61) and 3.5L (L66)) or Battery Replacement (2.4L (LAT)) .
  3. Drain the engine coolant. Refer to Draining and Filling Cooling System (Static Fill)  or Draining and Filling Cooling System (GE 47716 Fill) .
  4. Disconnect the engine coolant temperature (ECT) sensor electrical connector.
  5. Remove the ECT sensor.
  6. Remove the radiator inlet and outlet hoses from the crossover pipe.
  7. Disconnect the wiring harness ground terminal from the crossover pipe.
    8. Fig 2: Exploded View Of Thermostat (L66)
    GM1237799Courtesy of GENERAL MOTORS CORP.
  8. Remove the thermostat housing and thermostat from the crossover pipe.
    9. Fig 3: View Of Crossover Pipe & Crossover Pipe Bolts
    GM1237801Courtesy of GENERAL MOTORS CORP.
  9. Remove the crossover pipe bolts and crossover pipe.
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