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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSGMC1998ENVOY 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISBODY AND FRAMEBODY CONTROL SYSTEMSBODY CONTROL MODULETESTING AND INSPECTIONPROGRAMMING AND RELEARNING
1998 GMC Envoy 2WD V6-4.3L VIN W
Programming and Relearning
1998 GMC Envoy 2WD V6-4.3L VIN WSECTION Programming and Relearning
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.
2. Refer to the latest Techline Terminal and equipment user's instructions.
3. If the BCM fails to accept the program, perform the following steps:
^ Inspect all BCM connections.
^ Verify that the Techline Terminal and equipment have the latest software version.
^ Try to program the BCM again. If the programming fails again, replace the BCM. Refer to Service and Repair, Repair Instructions, Body Control Module Replacement.
^ For a functional check, refer to Body Control Module Diagnostic System Check.
4. Clear the diagnostic trouble codes (DTCs) after the programming is complete.
Learn Procedures
Requirements for Using Any Learn Procedure
Perform the Learn Procedure if any of the following components are replaced:
^ The Passlock sensor
^ The body control module (BCM)
^ The powertrain control module (PCM)
^ The vehicle control module (VCM)
Passlock 10 Minute Learn Procedure - Using the Techline Terminal and the Tech 2 Scan Tool
Follow the instructions displayed on the Techline Terminal and the Tech 2 scan tool for the 10 minute reprogramming procedure.
Passlock 30 Minute Learn Procedure
1. Turn the ignition switch to the OFF position.
2. Replace the failed component.
3. Turn the ignition switch to the RUN position (NOT the CRANK position).
4. Turn the ignition switch to the CRANK position, then release to the RUN position (Do NOT start the vehicle).
5. Observe the security telltale for 10 minutes.
6. After the ignition switch has been in the RUN position for 10 minutes, the security telltale will transition from ON, then to OFF.
7. Repeat Step 58 two more times.
8. After 3 consecutive cycles of the ignition switch are successfully completed, the vehicle will learn the new component on the next ignition lock cylinder cycle from the OFF position to the CRANK position, then to the RUN position. The vehicle will then start.
9. Clear the DTCs using a scan tool.
^ The battery is fully charged.
^ The ignition switch is in the RUN position.
^ The Data Link Connector (DLC) is accessible.
2. Refer to the latest Techline Terminal and equipment user's instructions.
3. If the BCM fails to accept the program, perform the following steps:
^ Inspect all BCM connections.
^ Verify that the Techline Terminal and equipment have the latest software version.
^ Try to program the BCM again. If the programming fails again, replace the BCM. Refer to Service and Repair, Repair Instructions, Body Control Module Replacement.
^ For a functional check, refer to Body Control Module Diagnostic System Check.
4. Clear the diagnostic trouble codes (DTCs) after the programming is complete.
Learn Procedures
Requirements for Using Any Learn Procedure
Perform the Learn Procedure if any of the following components are replaced:
^ The Passlock sensor
^ The body control module (BCM)
^ The powertrain control module (PCM)
^ The vehicle control module (VCM)
Passlock 10 Minute Learn Procedure - Using the Techline Terminal and the Tech 2 Scan Tool
Follow the instructions displayed on the Techline Terminal and the Tech 2 scan tool for the 10 minute reprogramming procedure.
Passlock 30 Minute Learn Procedure
1. Turn the ignition switch to the OFF position.
2. Replace the failed component.
3. Turn the ignition switch to the RUN position (NOT the CRANK position).
4. Turn the ignition switch to the CRANK position, then release to the RUN position (Do NOT start the vehicle).
5. Observe the security telltale for 10 minutes.
6. After the ignition switch has been in the RUN position for 10 minutes, the security telltale will transition from ON, then to OFF.
7. Repeat Step 58 two more times.
8. After 3 consecutive cycles of the ignition switch are successfully completed, the vehicle will learn the new component on the next ignition lock cylinder cycle from the OFF position to the CRANK position, then to the RUN position. The vehicle will then start.
9. Clear the DTCs using a scan tool.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.