When the StabiliTrak and ABS lights come on together, both the anti-lock braking system and the electronic stability control system have deactivated simultaneously. This occurs because both systems share the same wheel speed sensors and Electronic Brake Control Module (EBCM), so a single fault in a shared component triggers both warning lights at once.
What Does It Mean When the StabiliTrak and ABS Lights Come On Together?
NHTSA explains related safety context in NHTSA vehicle safety information.
Both lights activating at the same time indicate a fault in a component that feeds data to both systems. StabiliTrak is GM's version of electronic stability control (ESC). It relies on wheel speed data from the ABS sensors to detect and correct vehicle instability. When that data is interrupted or inaccurate, both systems shut down and alert the driver.
If only the StabiliTrak light is on, the likely cause is the steering wheel position sensor. If both the StabiliTrak and ABS lights are on, the fault is within the ABS system itself.
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What Is StabiliTrak and How Does It Relate to ABS?
StabiliTrak is a GM electronic stability system found on Chevrolet, GMC, Buick, and Cadillac vehicles. It applies individual brakes and adjusts engine power automatically to keep the vehicle on its intended path during skids, sharp turns, or emergency maneuvers. It uses 4 components that overlap directly with the ABS system:
- Wheel speed sensors at all 4 wheels
- The Electronic Brake Control Module (EBCM)
- The hydraulic brake actuator
- The vehicle CAN bus communication network
Because StabiliTrak depends on ABS wheel speed data to function, any fault that disables ABS also disables StabiliTrak, producing both warning lights simultaneously.
Is It Safe to Drive with the StabiliTrak and ABS Light On?
Driving with both lights on is possible under normal conditions. Standard braking remains functional. The risk increases in 3 specific situations:
- Emergency stops on wet, icy, or loose surfaces where wheel lockup is likely
- High-speed cornering where StabiliTrak would normally apply corrective braking
- Towing, where stability correction is more critical for vehicle control
Do not ignore both lights when they appear together with a red brake warning light or a soft brake pedal. That combination indicates a primary braking system fault, not only an ABS or stability system fault.
What Are the 6 Causes of the StabiliTrak and ABS Light Coming On Together?
The 6 main causes of the StabiliTrak and ABS warning lights activating together are wheel speed sensor faults, steering angle sensor misalignment, battery or alternator failure, ABS module failure, low brake fluid, and throttle body or engine misfire issues.
- Faulty wheel speed sensor: the most common cause, affecting 1 or more of the 4 sensors at each wheel due to dirt, damage, or wiring corrosion
- Failed ABS module (EBCM): ABS module failure usually lights up both the ABS and StabiliTrak warning lights together
- Failing wheel hub bearing: when a wheel bearing begins to fail, bearing grease coats the wheel speed sensor and causes a fault, requiring replacement of the entire hub and bearing assembly
- Debris on the tone ring: ferrous metallic debris stuck to the wheel speed sensor magnetic encoder ring produces DTC codes C0035 through C0050 and activates the ABS, traction control, and StabiliTrak warning lights simultaneously
- Low battery or failing alternator: low voltage disrupts communication between systems, triggering both warnings
- Steering angle sensor fault: misalignment after steering repairs or a defective unit sends incorrect data to the EBCM
What Fault Codes Do StabiliTrak and ABS Lights Produce?
Both warning lights produce C-codes stored in the EBCM. Common codes include:
| DTC Code | Description | Most Likely Cause |
|---|---|---|
| C0035 | Left front wheel speed sensor circuit | Sensor fault or wiring |
| C0040 | Right front wheel speed sensor circuit | Sensor fault or hub bearing |
| C0045 | Left rear wheel speed sensor circuit | Sensor or tone ring debris |
| C0050 | Right rear wheel speed sensor circuit | Sensor or bearing failure |
| C0121 | Valve solenoid circuit fault | EBCM or actuator fault |
| C0161 | ABS brake switch differential pressure | Low fluid or brake switch |
Note that these codes require a full system scanner capable of reading EBCM and ABS module codes. Basic OBD-II scanners do not read ABS or chassis codes and cannot access EBCM diagnostic trouble codes.
How Do You Diagnose StabiliTrak and ABS Warning Lights?
Diagnosing both warning lights follows 4 steps:
- Connect a full system scanner to the OBD-II port and navigate to the ABS or EBCM module to read all stored C-codes
- Identify which wheel speed sensor the code references, then inspect that sensor and its wiring harness for damage, corrosion, or loose connections
- Check the brake fluid reservoir. Low fluid activates both warning lights and points to a potential leak in the hydraulic circuit
- Test battery voltage. A healthy battery reads 12.6 volts at rest and 13.7 to 14.7 volts with the engine running. Voltage below 12 volts triggers false stability system faults
How Do You Reset the StabiliTrak and ABS Light?
3 reset procedures can clear the warning lights when no active fault exists:
- Restart the vehicle. Both lights clear automatically if the fault was temporary, such as a brief sensor signal dropout
- Disconnect the negative battery terminal for at least 5 minutes, reconnect it, start the engine, then turn the steering wheel fully left and right twice before driving for 1 minute. This procedure resets the steering wheel position sensor and clears related StabiliTrak faults
- Use a full system scanner to clear stored codes from the EBCM after repairing the fault
A reset without repairing the underlying fault produces temporary results. Stored codes return when the vehicle reaches the speed or condition that triggered the original event.
What Is the Repair Cost for StabiliTrak and ABS Light Issues?
Repair costs for a StabiliTrak fault range from $180 to $1,500 depending on the cause. The most common problem is a faulty ABS wheel speed sensor, which is the least expensive repair.
| Cause | Parts Cost | Labor Cost | Total Estimate |
|---|---|---|---|
| Wheel speed sensor replacement | $20 to $80 | $80 to $150 | $100 to $230 |
| Wheel hub and bearing assembly | $150 to $350 | $150 to $300 | $300 to $650 |
| Steering angle sensor | $80 to $200 | $80 to $150 | $160 to $350 |
| EBCM replacement | $300 to $900 | $100 to $200 | $400 to $1,100 |
| Battery or alternator replacement | $100 to $300 | $50 to $150 | $150 to $450 |
Which GM Vehicles Are Most Commonly Affected?
StabiliTrak and ABS lights appearing together are documented across 6 GM platforms:
- Chevrolet Silverado 1500 and 2500 HD
- GMC Sierra 1500
- Chevrolet Equinox and GMC Terrain
- Chevrolet Trailblazer
- Buick Enclave and LaCrosse
- Cadillac Escalade
Wheel speed sensor faults account for the majority of cases across all 6 platforms according to GM technical service bulletins.
StabiliTrak and ABS Light On: Summary
When the StabiliTrak and ABS lights come on together on a GM vehicle, both systems have deactivated due to a shared component fault. The 6 main causes are wheel speed sensor failure, EBCM fault, hub bearing wear, tone ring debris, low battery voltage, and steering angle sensor misalignment. Diagnosis requires a full system scanner that reads EBCM and ABS codes. Repair costs range from $100 for a wheel speed sensor to $1,100 for an EBCM replacement. Addressing the fault promptly restores both StabiliTrak and ABS protection and prevents the single fault from escalating into a costlier module repair.
Jimmy O’Riley is a UK-based mobile mechanic and automotive diagnostic specialist operating out of Bedfordshire, England. He founded O’Rileys Autos in 2011 with a focus on bringing professional vehicle repairs directly to customers at their homes and workplaces.
With over a decade of hands-on experience, Jimmy specializes in ABS diagnostics, brake system repairs, diesel emissions faults, and DPF cleaning. He is recognized across the UK and Ireland as one of the leading specialists in vehicle braking and emissions systems, earning the title “The DPF King” from his growing online audience.
Jimmy documents real-world automotive repairs through his YouTube channel, which has accumulated over 97,000 subscribers and nearly 2,000 published repair videos. His content covers ABS fault diagnosis, wheel speed sensor testing, brake module replacement, and roadside repair procedures across a wide range of vehicle makes and models.
He is active on YouTube, Instagram, and Facebook under O’Rileys Autos.