C Yukon 2WD 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 programming the VCM (EEPROM).
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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 an updated Techline terminal and follow the user's instructions for VCM programming.
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 ITCS terminal and equipment for the latest software version.
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Try again to program the VCM. If the programming fails again, replace the VCM.
4. Perform the Passlock Reprogramming Procedure.
5. Perform the CKP System Variation Learn Procedure.
6. For a functional check, perform the Powertrain On-Board Diagnostic (OBD) System Check.
