Yukon 4WD V8-6.5L DSL Turbo VIN S (1997)
5. If the PCM fails to reprogram, do the following:
^
Check all of the PCM connections.
^
Check the Techline terminal/equipment for the latest software version.
^
Try again to reprogram the PCM. If the reprogramming fails again, replace the PCM. Refer to PCM replacement.
PCM Programming (TDC Offset)
The PCM will automatically activate the TDC Offset program when the engine coolant is greater than 77°C (170°F). If the PCM is not programmed with
a TDC Offset, a DTC P1214 will set.
