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 MANUALSCHEVROLET1998CHEVY VAN G3500, VAN CARGO, 7.4 JREPAIR AND DIAGNOSISGENERAL INFORMATIONDTC INDEXANTI-THEFT SYSTEM DTCS
1998 Chevrolet Chevy Van G3500, Van Cargo, 7.4 J
Anti-Theft System DTCS
1998 Chevrolet Chevy Van G3500, Van Cargo, 7.4 JSECTION Anti-Theft System DTCS
ANTI-THEFT SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| B0688 | SECURITY INDICATOR LIGHT CIRCUIT HIGH |
| B2947 | PASSLOCK(R) SENSOR POWER CIRCUIT LOW |
| B2948 | PASSLOCK(R) SENSOR POWER CIRCUIT HIGH |
| B2957 | PASSLOCK(R) SENSOR DATA CIRCUIT LOW |
| B2958 | PASSLOCK(R) SENSOR DATA CIRCUIT HIGH |
| B2960 | SENSOR DATA INCORRECT BUT VALID |
| B3031 | CONTROLLER IN LEARN MODE |
| B3033 | SYSTEM INDICATES TAMPER |
| C0559 | CHECKSUM ERROR |
| U1016 | LOSS OF CLASS 2 COMMUNICATION WITH VCM |
| U1255 | CLASS 2 COMMUNICATION MALFUNCTION |
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.