C 1500 Truck 2WD V8-5.3L VIN T (1999)
Body Control Module: Procedures
Body Control Module (BCM) Programming/RPO Configuration
1. The Body Control Module (BCM) must be programmed with the proper RPO configurations. The BCM stores the information regarding the
vehicle options and if the BCM is not properly configured with the correct RPO codes the BCM will not control the features properly. Ensure that
the following conditions exist in order to prepare for BCM programming:
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The battery is fully charged.
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The ignition switch is in the RUN position.
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The Data Link Connector (DLC) is accessible.
2. Follow the 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:
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Inspect all BCM connections.
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Verify that the Techline Terminal and scan tool have the latest software version.
Passlock Learn Procedures
Requirements for Using Any Learn Procedure
Perform the Learn Procedure if any of the following components have been replaced:
IMPORTANT: If any module is replaced, programming the module must be done prior to performing the Passlock Learn procedure.
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The Passlock sensor
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The BCM
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The Powertrain Control Module (PCM)
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The Vehicle Control Module (VCM)
Passlock Learn Procedure - Using the Techline Terminal and the Scan Tool
Follow the instructions displayed on the Techline Terminal in Service Programming System (SPS) and the scan tool for this reprogramming
procedure.
Auto Learn Passlock Procedure
1. Turn the ignition switch to the RUN position (NOT the CRANK position).
2. Turn the ignition switch to the CRANK position, then release to the RUN position (Do NOT start the vehicle).
3. Observe the security telltale for approximately 10 minutes.
4. After the ignition switch has been in the RUN position for approximately 10 minutes, the security telltale will transition from ON, then to
OFF.
5. Repeat Steps 1-4 two more times.
6. 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.
7. Clear the DTCs using a scan tool.
VCM Replacement/Programming
Service of the PCM should normally consist of either replacement of the PCM or EEPROM programming. If the diagnostic procedures call for the PCM
to be replaced, the PCM should be checked first to see if it is the correct part. If it is, remove the faulty PCM and install the new service PCM.
THE SERVICE PCM EEPROM WILL NOT BE PROGRAMMED. DTC P0601 and P0602 indicates the EEPROM is not programmed or has
malfunctioned.
IMPORTANT: The following must be performed anytime the PCM is replaced:
1. Programming of the EEPROM See: Testing and Inspection
2. The PCM Password learn procedure. Refer to DTC P1631 Theft Deterrent Password Incorrect.
3. The Idle Learn Procedure. See: Testing and Inspection
4. The CKP System Variation Learn Procedure. See: Testing and Inspection
5. Reset the Engine Oil Life monitor. Refer to Engine Oil Life Monitor Reset Procedure.
6. The Functional Check
The following must be performed anytime the PCM is disconnected, loses power, or is reprogrammed.
1. The Idle Learn Procedure. Refer to PCM Idle Learn Procedure.
2. The Functional Check
IMPORTANT: To prevent internal PCM damage, the ignition must be OFF when disconnecting or reconnecting power to the PCM (for example,
battery cable, PCM pigtail, PCM fuse, jumper cables, etc.).
