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Home >> GMC >> 2000 >> C3500 HD 6.5 F, Standard >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Anti-Theft System - Escalade, Express, Pickup, SAVANA, TAHOE & YUKON DENALI >> Diagnostic Tests >> DTC B0688: Security Indicator Light Circuit High >> Circuit Description

Circuit Description

This DTC sets when Passlock™ module is trying to ground SECURITY lamp driver and circuit voltage is more than 2.9 volts for .15 second.