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Home >> GMC >> 2021 >> Terrain SLT, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Active Noise Cancellation System >> Diagnostic Information and Procedures >> DTC B126F, B1277, B127C, or B127D (Amplifier) >> DTC Descriptors

DTC Descriptors

DTC B1277

Microphone 1 Input Signal Circuit

DTC B127C

Microphone 2 Input Signal Circuit

DTC B127D

Microphone 3 Input Signal Circuit

DTC B126F

Microphone 4 Input Signal Circuit

For symptom byte information refer to Symptom Byte List

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