Base Engine Misfire with Coolant Consumption. Chevrolet Chevy C Cab/Chassis HD (GMT 400) 2004

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2004 🢒 Chevy C Cab/Chassis HD (GMT 400) 🢒 Engine 🢒 Engine Mechanical - 8.1L 🢒 Base Engine Misfire with Coolant Consumption

Cause

Correction

Faulty cylinder head gaskets and/or cracking or other damage to the cylinder heads and engine block cooling system passages.

Coolant consumption may or may not cause the engine to overheat.

•	Inspect for spark plugs saturated by coolant. Refer to Spark Plug Inspection in Engine Controls.

•	Perform a pressure test to the cooling system. Refer to Loss of Coolant in Engine Cooling.

•	Perform a cylinder leak down test.

•	Inspect the cylinder heads and engine block for damage to the coolant passages and/or a faulty head gasket.

•	Repair or replace as required.