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 MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 622 (ANTI-LOCK BRAKE SYSTEM)DESCRIPTION AND OPERATIONABS DESCRIPTION AND OPERATIONTRACTION CONTROL SYSTEM INDICATORSTRAC OFF
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Trac Off
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Trac Off
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
The IPC illuminates the TRAC OFF indicator when any of the following occur:
- The electronic brake control module (EBCM) inhibits the traction control system due to a malfunction in the traction control system. The IPC receives a class 2 message from the EBCM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.
- The IPM detects that the traction control switch is pressed. The IPC receives a class 2 message from the IPM requesting illumination.
- The IPC receives a class 2 message from the EBCM requesting illumination of the ABS indicator.
- The IPC detects a loss of class 2 communications with the EBCM, and the discrete back-up ABS signal circuit is high.
- The IPC performs the displays test at the start of each ignition cycle. The indicator is illuminated for approximately 5 seconds.
RENDER: 1.0x
NO RELATED
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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.