Grand Prix V6-3.8L SC VIN 1 (1997)
Engine Block Heater: Testing and Inspection
If engine block heater fails to operate, perform the following inspections:
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Check power supply.
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Check electrical cord connections at the power supply and at the engine block heater.
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Check electrical cord for proper routing, opens or shorts.
If all the above check good, replace the engine block heater.
