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DTC Descriptors

WARNING: This page is about a different car, the 2017 GMC Acadia Limited, 2017 Chevrolet Traverse, and 2017 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
DTC U18A2

Lost Communication with Fuel Pump Driver Control Module

For symptom byte information, refer to Symptom Byte List .