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.
2004 GMC Jimmy (CANADA) V6-4.3LFACTORY OEM SERVICE PROCEDURE
Body Control Module: Testing and Inspection
BODY CONTROL MODULE (BCM) PROGRAMMING/RPO CONFIGURATION
IMPORTANT: If any module is replaced, the module must be programmed with the regular production options (RPO) prior to performing the Passlock Learn procedure. The Techline Terminal automatically selects the RPO codes based on the vehicle identification number (VIN).
1. Ensure that the following conditions exist in order to prepare for BCM programming:
- The battery is fully charged.
- The ignition switch is in the RUN position.
- The data link connector (DLC) is accessible.
- All accessories are turned OFF.
2. Follow the service programming system (SPS) instructions on the Techline Terminal and scan tool to program the BCM.
3. If the BCM fails to accept the program, perform the following steps:
- Inspect all DLC, scan tool and Techline Terminal connections.
- Insure that the battery is fully charged.
- Verify that the SPS Techline Terminal and scan tool have the latest software version.
- Inspect all BCM connections.
Passlock Learn Procedures
After the BCM has been replaced and reprogrammed, the powertrain control module (PCM) must learn the new fuel continue password. Refer to Programming Theft Deterrent System Components for the appropriate learn procedure.
IMPORTANT: After programming, perform the following to avoid future misdiagnosis:
1. Turn OFF the ignition for 10 seconds.
2. Connect the scan tool to the data link connector (DLC).
3. Turn ON the ignition, with the engine OFF.
4. Retrieve history DTCs from all modules with the scan tool.
5. Clear all history DTCs with the scan tool.
IMPORTANT: If any module is replaced, the module must be programmed with the regular production options (RPO) prior to performing the Passlock Learn procedure. The Techline Terminal automatically selects the RPO codes based on the vehicle identification number (VIN).
1. Ensure that the following conditions exist in order to prepare for BCM programming:
- The battery is fully charged.
- The ignition switch is in the RUN position.
- The data link connector (DLC) is accessible.
- All accessories are turned OFF.
2. Follow the service programming system (SPS) instructions on the Techline Terminal and scan tool to program the BCM.
3. If the BCM fails to accept the program, perform the following steps:
- Inspect all DLC, scan tool and Techline Terminal connections.
- Insure that the battery is fully charged.
- Verify that the SPS Techline Terminal and scan tool have the latest software version.
- Inspect all BCM connections.
Passlock Learn Procedures
After the BCM has been replaced and reprogrammed, the powertrain control module (PCM) must learn the new fuel continue password. Refer to Programming Theft Deterrent System Components for the appropriate learn procedure.
IMPORTANT: After programming, perform the following to avoid future misdiagnosis:
1. Turn OFF the ignition for 10 seconds.
2. Connect the scan tool to the data link connector (DLC).
3. Turn ON the ignition, with the engine OFF.
4. Retrieve history DTCs from all modules with the scan tool.
5. Clear all history DTCs with the scan tool.
Factory Service Tools
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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.
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