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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 648 (Engine Cooling System) >> Repair Instructions >> Coolant Heater Replacement (4.8L, 5.3L & 6.0L Engines) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 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 United States 12346004, GM P/N Canada 10953480, or equivalent to the threads.
  2. Install the coolant heater to the engine block. Tighten the coolant heater to 50 N.m (37 lb ft).
    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 & Filling Cooling System .
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