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 MANUALSCHEVROLET2018SPARK LS, STANDARD TRANSREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMDATA COMMUNICATIONS SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC U007CDIAGNOSTIC FAULT INFORMATION

2018 Chevrolet Spark LS, Standard Trans

Diagnostic Fault Information

2018 Chevrolet Spark LS, Standard TransSECTION Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Gateway Isolated High Speed GMLAN Serial Data (+) or High Speed GMLAN Serial Data (+) (9)	U007C	U007C	U007C	-
Gateway Isolated High Speed GMLAN Serial Data (-) or High Speed GMLAN Serial Data (-) (9)	U007C	U007C	U007C	-

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.