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Removal Procedure

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Coolant Heater (3.8L)
    GM179497Courtesy of GENERAL MOTORS CORP.
  1. Drain the cooling system. Refer to Draining and Filling Cooling System (LY7)  or Draining and Filling Cooling System (L26) .
  2. Disconnect the coolant heater cord from the coolant heater.
  3. Loosen the bolt at the coolant heater but do not remove.
  4. Remove the coolant heater.
  5. Remove and clean any burrs, compound, paint, or rough spots from the core plug hole.
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