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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1626 (Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Base Engine Misfire with Coolant Consumption

Base Engine Misfire with Coolant Consumption

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
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.
  1. Inspect for spark plugs saturated by coolant. Refer to Spark Plug Inspection .
  2. Perform a cylinder leak down test. Refer to Cylinder Leakage Test .
  3. 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 .
  4. Repair or replace, as required.
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