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Cadillac
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2009
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STS RWD V6-3.6L
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Repair and Diagnosis
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Powertrain Management
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Tune-up and Engine Performance Checks
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Compression Check
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Specifications
Compression Check: Specifications
The lowest reading should not be less than 70 percent of the highest reading
No cylinder reading should be less than 965 kPa (140 psi)