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Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptor DTC B2585 00 Park Lamp Control Circuit Diagnostic Fault Information Circuit/System Description Voltage is applied at all times to the park lamp relay from battery voltage. When the headlamp Conditions for Running the DTC The Ignition is ON. The park lamps must be commanded ON by the BCM. Conditions for Setting the DTC The BCM detects a short to voltage on the park lamp relay control circuit. Action Taken When the DTC Sets All park, license, and tail lamps are inoperative. Conditions for Clearing the DTC Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance Park Lamp Relay Control 1 2 B2585 00 - 1. Park, License, and Tail Lamps Always On 2. Park, License, and Tail Lamps Inoperative
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Lighting - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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