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Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References for scan tool information Circuit/System Verification Ignition ON, perform the IPC display test using a scan tool. Verify the indicator illuminates and If the indicator does not operate as expected during this test, replace the IPC. If the indicator functions normally during this test, replace the ECM/PCM. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Control Module References for ECM, PCM or IPC replacement, setup and programming CRUISE CONTROL MALFUNCTION Diagnostic Instructions 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. Circuit/System Description The body control module (BCM) supplies battery voltage to the cruise control switch. The cruise Conditions for Enabling Cruise Control The vehicle speed is greater than 40 km/h (25 mph). The vehicle is not in PARK, REVERSE, NEUTRAL, or 1st gear.
2008 Chevrolet Silverado 1500 2008 ENGINE Cruise Control - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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