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Home >> GMC >> 1998 >> Envoy >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Module >> Diagnosis & Testing >> DTC B3137: Door Lock Circuit Low >> Circuit Description
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Circuit Description

TBC module monitors circuit No. 195 (Light Blue wire) as an input to determine if door lock relay circuit is grounded. See WIRING DIAGRAMS  . When circuit is shorted to ground, DTC will set.

Conditions for setting DTC: