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 266 (BODY CONTROL MODULES)DIAGNOSTIC TESTSDTC C1245: LOW TIRE PRESSURECODE ENABLE CRITERIA
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Code Enable Criteria
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Code Enable Criteria
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 following must occur for DTC to run:
- There must be no ABS or TCS malfunctions present
- calibration process must be at least partially complete
- vehicle speed must be between 15-90 MPH (24-145 km/h)
- DTC C1245 will set when EBCM detects a tire pressure difference in one tire of 69 kPa (10 psi) higher or lower than other three.
- DTC C1245 will set if there is a loss of, or low system battery voltage.
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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.