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 MANUALSCHEVROLET1997CHEVY EXPRESS G3500, VAN CARGO, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 75 (ANTI-THEFT SYSTEM)DIAGNOSTIC TESTSDTC B2958: PASSLOCK(R) SENSOR DATA CIRCUIT HIGHTESTING
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 F
DTC B2958: PASSLOCK(R) Sensor Data Circuit High: Testing
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 FSECTION Testing
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 1998 GMC Savana Special, 1998 GMC Savana Camper Special, 1998 GMC Savana, 1998 Chevrolet RV Cutaway, and 1998 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Perform system check. See SYSTEM CHECK under SYSTEM TESTS. Go to next step.
- Using scan tool, check for VCM DTCs. If an incorrect password DTC exists, go to next step. If an incorrect password DTC does not exist, go to step 4).
- If ignition was turned quickly off then on while running, this DTC and/or an incorrect password DTC may be set. Record any other DTCs and clear all DTCs. Perform SYSTEM CHECK under SYSTEM TESTS.
- Ensure ignition is on. Using scan tool, read PASSLOCK(R) sensor signal voltage. If voltage is 4.5 volts or more, go to next step. If voltage is less than 4.5 volts, replace PASSLOCK(R) sensor. Go to step 9).
- Turn ignition off. Disconnect PASSLOCK(R) module and PASSLOCK(R) 3-pin sensor connectors. Check voltage between PASSLOCK(R) module harness connector terminal B7 (Yellow wire) and ground. If voltage is less than one volt, go to next step. If voltage is one volt or more, repair short to voltage in Yellow wire between PASSLOCK(R) module harness connector terminal B7 and PASSLOCK(R) 3-pin sensor connector C266 terminal D3. Go to step 9).
- Check resistance of Yellow wire between PASSLOCK(R) module harness connector terminal B7 and PASSLOCK(R) 3-pin sensor connector C266 terminal D3. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or more, repair open in Yellow wire between PASSLOCK(R) module harness connector terminal B7 and PASSLOCK(R) 3-pin sensor connector C266 terminal D3. Go to step 9).
- Check resistance of Orange/Black wire between PASSLOCK(R) module harness connector terminal B5 and PASSLOCK(R) 3-pin sensor connector C266 terminal C4. If resistance is less than 10 ohms, go to next step. If resistance is 10 ohms or more, repair open in Orange/Black wire between PASSLOCK(R) module harness connector terminal B5 and PASSLOCK(R) 3-pin sensor connector C266 terminal C4. Go to step 9).
- Reconnect PASSLOCK(R) module and PASSLOCK(R) sensor connectors. Turn ignition on. Disconnect PASSLOCK(R) sensor connector. Check voltage between PASSLOCK(R) 3-pin sensor connector C266 terminals D3 (Yellow wire) and C4 (Orange/Black wire). If voltage is 4 volts or less, replace PASSLOCK(R) module. See PASSLOCK(R) MODULE under REMOVAL & INSTALLATION. Go to next step. If voltage is more than 4 volts, check PASSLOCK(R) sensor mounting, magnet and other mechanical parts. Repair as necessary. If no problem is found, replace PASSLOCK(R) sensor. Go to next step.
- Reconnect all connectors and components. Turn ignition on. Using scan tool, clear all DTCs. Perform reprogramming procedure. See PROGRAMMING. Perform SYSTEM CHECK under SYSTEM TESTS.
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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.