Silverado 1500 2WD V6-4.3L VIN X (2004)
Engine Block Heater: Service and Repair
Coolant Heater Replacement
Coolant Heater Replacement (4.3L Engine)
Removal Procedure
1. Drain the cooling system.
2. Disconnect the heater cord from the coolant heater (4).
3. Loosen the coolant heater bolt.
4. Remove the coolant heater from the engine block.
5. Do not score the machined surface of the hole.
6. Grasp the plug with pliers.
7. Pull the plug from the engine block.
8. Clean the core plug hole in order to remove the following substances:
^
Burrs
^
Compound
^
Paint
^
Rough spots
Installation Procedure
1. Coat the O-ring seal and the cleaned surface of the plug opening with water resistant high-temperature grease lubricant GM P/N 9985164
(Canadian P/N 10953480), or the equivalent.
2. Important: Avoid element contact with the inside walls of the engine block.
Tightly push the coolant heater (1) into the engine block.
