Base Engine Misfire with Coolant Consumption. Chevrolet TrailBlazer

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2003 🢒 TrailBlazer - 2WD 🢒 Engine 🢒 Engine Mechanical - 4.8L, 5.3L, and 6.0L 🢒 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 - Refer to Diagnostic Starting Point - Engine Cooling in Engine Cooling.

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 - 5.3L.

•	Perform a cylinder leak down test. Refer to Cylinder Leakage Test .

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

•	Repair or replace as required.