DTC Descriptors

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

DTC B051A 0B: Left Side Assist Step Motor Control Circuit Current Above Threshold
DTC B051A 01: Left Side Assist Step Motor Control Circuit Short to Battery
DTC B051A 02: Left Side Assist Step Motor Control Circuit Short to Ground
DTC B051A 04: Left Side Assist Step Motor Control Circuit Open Circuit
DTC B051B 0B: Right Side Assist Step Motor Control Circuit Current Above Threshold
DTC B051B 01: Right Side Assist Step Motor Control Circuit Short to Battery
DTC B051B 02: Right Side Assist Step Motor Control Circuit Short to Ground
DTC B051B 04: Right Side Assist Step Motor Control Circuit Open Circuit
DTC B051C 01: 10 V Reference Circuit Short to Battery
DTC B051C 02: 10 V Reference Circuit Short to Ground
DTC B051C 2A: Left Side Assist Step Position Sensor Circuit Too Many Pulses
DTC B051C 22: Left Side Assist Step Position Sensor Circuit Low Time < Minimum
DTC B051C 29: Left Side Assist Step Position Sensor Circuit Too Few Pulses
DTC B051C 62: Left Side Assist Step Position Sensor Circuit Actuator Stuck Open
DTC B051C 63: Left Side Assist Step Position Sensor Circuit Actuator Stuck Closed
DTC B051D 2A: Right Side Assist Step Position Sensor Circuit Too Many Pulses
DTC B051D 22: Right Side Assist Step Position Sensor Circuit Low Time < Minimum
DTC B051D 29: Right Side Assist Step Position Sensor Circuit Too Few Pulses
DTC B051D 62: Right Side Assist Step Position Sensor Circuit Actuator Stuck Open
DTC B051D 63: Right Side Assist Step Position Sensor Circuit Actuator Stuck Closed