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Home >> Chevrolet >> 2021 >> Suburban Z71 >> Repair and Diagnosis >> Body & Frame >> Towing Systems >> TRAILERING Systems >> Diagnostic Information and Procedures >> DTC U3003 (Trailer Lamp Control Module) >> Circuit/System Description
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Circuit/System Description

The K68 Trailer Lamp Control Module monitors the system voltage to ensure that it stays within the proper range. If voltage is lost to the Trailer Lamp Control Module due to a blown fuse, the customers trailer likely has an electrical fault that caused the fuse to blow.

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