C0035 on GMC
Left Front Wheel Speed Sensor Circuit
C0035 on GMC vehicles indicates left front wheel speed sensor circuit. Au7o has documented this code across 4 GMC models — most commonly on Acadia, Sierra 1500, Terrain. This chassis code indicates a fault in the left front wheel speed sensor circuit. Each wheel has a speed sensor that tells the ABS, traction control, and stability control systems how fast that wheel is turning; the control module sets this code when the signal from the left front sensor is missing, erratic, or out of range. Without a valid reading, the computer can't safely operate anti-lock braking and related systems, so it usually disables ABS and traction/stability control and lights the corresponding dashboard warnings (normal braking still works). It generally points to the sensor itself, its wiring, or the toothed reluctor ring it reads. Typical repair costs on GMC range from $150 to $1,500, depending on the specific model and root cause.
Common Causes of C0035
- •Faulty left front wheel speed sensor
- •Damaged sensor wiring or connector (road debris, corrosion)
- •Metal debris or rust on the sensor tip or air gap
- •Damaged or cracked tone/reluctor ring
- •Loose or improperly seated sensor
- •Corroded or loose wheel bearing with integrated sensor
- •Open or short in the sensor circuit
- •Faulty ABS control module (less common)
C0035 on GMC by Model
GMC Acadia(1 issue)
- Front and Rear Wheel Hub Bearing Assembly Failure With Integrated ABS Tone Ring Degradation2007-2018
The Lambda-platform hub bearing assemblies wear early — owners report failures well under 60,000 miles and, on the rear, repeat failures on the same vehicle. Two distinct symptoms come from one part: mechanical noise (a speed-dependent hum or growl that changes when the vehicle is loaded in a turn) and an ABS fault, because the encoder/tone ring on GM Lambda hubs is magnetically printed onto the bearing's inner race surface. When that magnetic layer degrades or sloughs off, the ABS module gets an implausible wheel speed signal and posts a wheel speed sensor code even though the sensor itself is fine — which is why replacing the sensor does not fix it.
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.
GMC Terrain(1 issue)
- Wheel Bearing / Hub Assembly Magnetic Encoder Ring Failure - ABS and Traction Lights Without Bearing Noise2010-2024
Terrain front and rear hub assemblies integrate the ABS magnetic encoder ring into the bearing's inboard seal, where it sits directly exposed to road salt and moisture. Two distinct failure modes result. The mechanical one is the familiar humming or roaring that rises with speed and changes when loading the bearing in a wide turn. The one that fools owners and shops is encoder-ring failure on a bearing that is still mechanically tight and silent: the wheel speed signal drops out and the vehicle sets a wheel speed sensor code with ABS, traction control and stability control disabled. Replacing only the external sensor does not fix it, because the encoder is part of the bearing. Both generations are affected, with salt-belt vehicles failing earliest.
GMC Yukon XL(1 issue)
- Front Hub Bearing and ABS Wheel Speed Sensor Corrosion Causing Unwanted ABS Activation2000-2006
GMT800 SUVs commonly develop corrosion under the front wheel speed sensors or wear in the hub bearing assembly, which alters the low-speed wheel speed signal. The result is unexpected ABS activation at parking-lot speeds, longer stopping distances, and a pulsating brake pedal even on dry pavement. GM documented this condition in service bulletins, and owners frequently report replacing hub assemblies to cure it.
Looking for C0035 on a different make?
View C0035 across all makes →Frequently Asked Questions
What does C0035 mean on GMC?▼
C0035 stands for "Left Front Wheel Speed Sensor Circuit." This chassis code indicates a fault in the left front wheel speed sensor circuit. Each wheel has a speed sensor that tells the ABS, traction control, and stability control systems how fast that wheel is turning; the control module sets this code when the signal from the left front sensor is missing, erratic, or out of range. Without a valid reading, the computer can't safely operate anti-lock braking and related systems, so it usually disables ABS and traction/stability control and lights the corresponding dashboard warnings (normal braking still works). It generally points to the sensor itself, its wiring, or the toothed reluctor ring it reads. On GMC specifically, this code is documented across 4 models.
What causes C0035 on GMC vehicles?▼
Common causes on GMC: Faulty left front wheel speed sensor, Damaged sensor wiring or connector (road debris, corrosion), Metal debris or rust on the sensor tip or air gap, Damaged or cracked tone/reluctor ring, Loose or improperly seated sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C0035 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 C0035 documented?▼
Au7o has documented C0035 on 4 GMC models: Acadia, Sierra 1500, Terrain, Yukon XL.