loss of compression

Asked by mrszacarias Feb 04, 2020 at 09:50 PM about the 2003 GMC Yukon XL Denali 4WD

Question type: Maintenance & Repair

my engine is reporting loss on left side of engine

2 Answers

F_O_R answered 4 years ago

What does this mean? Engines don't report the compression.

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James answered 4 years ago

Very low compression on all cylinders is a jumped timing chain. Very low compression on two cylinders next to each other is a blown head gasket. Hope that helps! Jim

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