Express 1/2 Ton Van V8-5.7L VIN R (1999)
Vehicle Control Module: Service and Repair
VCM Programming
1. Take the following steps in order to set-up for the VCM (EEPROM) Programming.
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The battery is fully charged.
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The ignition is ON.
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The Data Link Connector (DLC) is secure.
2. Refer to up-to-date Techline terminal and equipment user's instructions in order to program the VCM.
3. If the VCM fails to program, do the following functions:
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Check all the VCM connections.
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Check the Techline terminal and equipment for the latest software version.
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Try again to program the VCM. If it fails again, replace the VCM.
4. Perform the Passlock Reprogramming Procedure. Refer to PASSLOCK Reprogramming Seed and Key in Theft Deterrent.
5. Perform the CKP System Variation Learn Procedure. Refer to CKP System Variation Learn Procedure.
6. For a functional check perform the Powertrain On-Board Diagnostic (OBD) System Check. Refer to A Powertrain On Board Diagnostic (OBD)
System Check.
