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 MANUALSCHEVROLET2025TRAILBLAZER ACTIV, FWDREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLANTILOCK BRAKE SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC C05CCCIRCUIT/SYSTEM VERIFICATION
2025 Chevrolet Trailblazer ACTIV, FWD
Circuit/System Verification
2025 Chevrolet Trailblazer ACTIV, FWDSECTION Circuit/System Verification
- Ignition/Vehicle - Off
- Test or inspect for the following: Brake Pedal = Binding or Sticking
Refer to: Brake System Slow Release
- Perform the scan tool control function: Brake Master Cylinder Pressure Test
- If the procedure/test passes
- Ignition/Vehicle - Off - For greater than 5 min
- Ignition/Vehicle - On - For greater than 30 s - Brake Pedal Not Applied
- Verify DTC C05CC is not set
- If the DTC sets
Replace the component: A104 Brake Master Cylinder
- Go to next step: If the DTC is not set
- If the DTC sets
- All OK.
- Go to next step: If the procedure/test does not pass
- Bleed the brake system. Refer to: Hydraulic Brake System Bleeding (Pressure)
- Perform the scan tool control function: Brake Hydraulics Test
- If the procedure/test does not pass
- Replace the component: A104 Brake Master Cylinder
- Go to next step: If the procedure/test passes
- Ignition/Vehicle - Off - For greater than 5 min
- Ignition/Vehicle - On - For greater than 30 s - Brake Pedal Not Applied
- Verify DTC C05CC is not set
- If the DTC sets
Replace the component: A104 Brake Master Cylinder
- Go to next step: If the DTC is not set
- If the DTC sets
- All OK.
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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.