C0050 on GMC
Right Rear Wheel Speed Sensor Circuit
C0050 on GMC vehicles indicates right rear wheel speed sensor circuit. Au7o has documented this code across 1 GMC model — most commonly on Sierra 1500. This is a brake/ABS-system code. The right rear wheel speed sensor reports how fast that wheel spins so the anti-lock brake, traction control, and stability systems can do their job. C0050 means the ABS module detected an electrical fault in the right rear wheel speed sensor circuit — an open, short, or an erratic/out-of-range signal. This usually turns on the ABS and traction/stability warning lights and may disable those features, though standard braking remains available. Typical repair costs on GMC range from $150 to $1,500, depending on the specific model and root cause.
Common Causes of C0050
- •Failed right rear wheel speed sensor
- •Damaged, corroded or disconnected sensor wiring/connector
- •Damaged or rusty tone/reluctor ring (missing or clogged teeth)
- •Excessive air gap between sensor and tone ring
- •Wheel bearing wear affecting an integrated sensor
- •Moisture or corrosion in the connector
- •Faulty ABS control module (less common)
C0050 on GMC by Model
GMC Sierra 1500(2 issues)
- Electronic Brake Control Module Failure2014-2023
The electronic brake control module (EBCM) experiences failures causing ABS, traction control, and stability control systems to malfunction. Issues range from warning lights illuminating to complete system failures. The 2023 models have a specific recall for software that may fail to display a warning light when brake fluid loss occurs.
- Front Hub Bearing Assembly Failure Causing ABS Activation, Noise, and Wheel Play1999-2013
Front wheel hub bearing assemblies on Sierra 1500 trucks commonly wear out, especially on 4WD models and trucks used with larger tires or in rough conditions. Owners report humming or growling that changes with speed, looseness in the front wheel, and in some cases ABS warnings or low-speed ABS activation because the wheel speed sensor is integrated into the hub. This is a frequent repair item across both GMT800 and GMT900 generations.
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What does C0050 mean on GMC?▼
C0050 stands for "Right Rear Wheel Speed Sensor Circuit." This is a brake/ABS-system code. The right rear wheel speed sensor reports how fast that wheel spins so the anti-lock brake, traction control, and stability systems can do their job. C0050 means the ABS module detected an electrical fault in the right rear wheel speed sensor circuit — an open, short, or an erratic/out-of-range signal. This usually turns on the ABS and traction/stability warning lights and may disable those features, though standard braking remains available. On GMC specifically, this code is documented across 1 model.
What causes C0050 on GMC vehicles?▼
Common causes on GMC: Failed right rear wheel speed sensor, Damaged, corroded or disconnected sensor wiring/connector, Damaged or rusty tone/reluctor ring (missing or clogged teeth), Excessive air gap between sensor and tone ring, Wheel bearing wear affecting an integrated sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C0050 on a GMC?▼
Repair costs on GMC range from $150 to $1,500, depending on the specific model and root cause.
Which GMC models have C0050 documented?▼
Au7o has documented C0050 on 1 GMC model: Sierra 1500.