Operation CHARM
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GMC
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1988
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Jimmy Full Size V8-379 6.2L DSL
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Repair and Diagnosis
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Engine, Cooling and Exhaust
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Engine
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Compression Check
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Specifications
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Compression Check: Specifications
2068 kPa (300 psi).
Perform compression test with engine at normal operating temperature, glow plugs removed and throttle wide open.