gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Coolant Heater Cord Replacement|Page 3390 > < Coolant Heater Cord Replacement|Page 3388
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Engine Block Heater: Service and Repair
Coolant Heater Replacement

Coolant Heater Replacement

Removal Procedure

1. Drain the cooling system. 
2. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
3. Disconnect the coolant heater electrical connector (2).

Important:  Do not score the surface of the engine block hole when removing the coolant heater. 

4. Remove the coolant heater from the engine block.
5. Remove any burrs, sealer, paint or other rough spots.

Installation Procedure

Coolant Heater Cord Replacement|Page 3390 > < Coolant Heater Cord Replacement|Page 3388