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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1620 (Engine Cooling System) >> Repair Instructions >> Coolant Heater Replacement (4.8L, 5.3L, and 6.0L Engines) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. If re-using the old coolant heater, apply thread sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent to the threads.
    NOTE: Refer to FASTENER NOTICE .
  2. Install the coolant heater to the engine block.

    Tighten 

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

    Fig 1: Install Coolant Heater
    G02109273Courtesy 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.
  3. Connect the coolant heater electrical connector (2).
  4. Lower the vehicle.
  5. Fill the cooling system. Refer to Draining and Filling Cooling System .
    Fig 2: Connect Coolant Heater Electrical Connector
    G02109274Courtesy of GENERAL MOTORS CORP.
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