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GMC Truck
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1983
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Jimmy Full Size V8-379 6.2L DSL
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Repair and Diagnosis
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Specifications
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Pressure, Vacuum and Temperature Specifications
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Compression Check
Compression Check
1896 kPa (275 psi) minimum at 200 rpm
The lowest reading cylinder should not be less than 70% of the highest.
Perform compression test with engine at normal operating temperature, glow plugs removed and throttle wide open.