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.
2003 Pontiac Sunfire AutomaticFACTORY OEM SERVICE PROCEDURE
Passlock Learn Procedures
IMPORTANT:
If any module or device listed is replaced, programming of the module must be done prior to performing the Passlock Learn procedure.
Perform the Learn Procedure if any of the following components have been replaced:
- The body control module (BCM)
- The Passlock sensor Refer to PROGRAMMING THEFT DETERRENT SYSTEM COMPONENTS in Theft Deterrent for the proper procedure.
- The powertrain control module (PCM) Refer to SERVICE PROGRAMMING SYSTEM OFF BOARD REMOTE PROCEDURE or SERVICE PROGRAMMING SYSTEM PASS-THRU PROCEDURE or SERVICE PROGRAMMING SYSTEM OFF BOARD REMOTE PROCEDURE or SERVICE PROGRAMMING SYSTEM OFF BOARD PASS-THRU PROCEDURE in Programming for the proper procedure.
IMPORTANT:
After programming, perform the following to avoid future misdiagnosis:
- Turn the ignition OFF for 10 seconds.
- Connect the scan tool to the data link connector.
- Turn the ignition ON with the engine OFF.
- Use the scan tool in order to retrieve history DTCs from all modules.
- Clear all history DTCs.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.