DTC Descriptors

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

DTC B1277 01: Microphone 1 (LF) Input Signal Circuit Short to Battery
DTC B1277 02: Microphone 1 (LF) Input Signal Circuit Short to Ground
DTC B1277 04: Microphone 1 (LF) Input Signal Circuit Open
DTC B1277 1A: Microphone 1 (LF) Input Signal Circuit Bias Level Out of Range
DTC B127C 01: Microphone 2 (RF) Input Signal Circuit Short to Battery
DTC B127C 02: Microphone 2 (RF) Input Signal Circuit Short to Ground
DTC B127C 04: Microphone 2 (RF) Input Signal Circuit Open
DTC B127C 1A: Microphone 2 (RF) Input Signal Circuit Bias Level Out of Range
DTC B127D 01: Microphone 3 (RR) Input Signal Circuit Short to Battery
DTC B127D 02: Microphone 3 (RR) Input Signal Circuit Short to Ground
DTC B127D 04: Microphone 3 (RR) Input Signal Circuit Open
DTC B127D 1A: Microphone 3 (RR) Input Signal Circuit Bias Level Out of Range