Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2025TRAVERSE HIGH COUNTRY, FWDREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLANTILOCK BRAKE SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC C2A20CIRCUIT/SYSTEM VERIFICATION
2025 Chevrolet Traverse High Country, FWD
Circuit/System Verification
2025 Chevrolet Traverse High Country, FWDSECTION Circuit/System Verification
- Ignition - On/Vehicle - In Service Mode
- Perform the scan tool control function: Deactivate Brake Boost System
- Verify there are no leaks in the component/system: Brake System - Refer to: Brake Fluid Loss
- Apply the brake pedal. - More than 2 times.
- Perform the scan tool control function: Brake Hydraulics Test
- If the procedure/test does not pass
Refer to: Hydraulic Brake System Bleeding (Manual)
- Go to next step: If the procedure/test passes
- If the procedure/test does not pass
- Ignition/Vehicle - Off - For greater than 10 min
- Ignition/Vehicle - On - For greater than 15 s - Brake Pedal Not Applied
- Apply and hold the brake pedal. - Hard - For greater than 120 s
- Release the brake pedal.
- Verify DTC C2A20 is not set
- If DTC C2A20 is set
Test or replace the component: A104Brake Master Cylinder
- Go to next step: If the DTC is not set
- If DTC C2A20 is set
- All OK.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.