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2000
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C3500 HD 6.5 F, Standard
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Repair and Diagnosis
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Body & Frame
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Door Locks
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Anti-Theft System - Escalade, Express, Pickup, SAVANA, TAHOE & YUKON DENALI
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Diagnostic Tests
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DTC B0688: Security Indicator Light Circuit High
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Diagnostic Aids
Diagnostic Aids
If DTC is a history DTC, problem may be intermittent. Perform tests while wiggling wiring.
Fig 1: Identifying Passlock™ Module Connector Terminals
Courtesy of GENERAL MOTORS CORP.
Courtesy of GENERAL MOTORS CORP.