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Cadillac
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2003
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Seville SLS
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Troubleshooting - No Codes
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Symptoms
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Engine Backfires
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Engine Cooling System
Engine Cooling System
Inspect for proper engine coolant level.
Inspect the engine thermostat for proper operation or for the wrong heat range. See appropriate COOLING SYSTEM SPECIFICATIONS & DRIVE BELT ROUTING article in ENGINE COOLING.