Powertrain Control Module (PCM) Programming (6.5L Diesel)

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 1998 Pontiac Trans Sport, 1998 Oldsmobile Silhouette, 1998 Oldsmobile Bravada, 1998 GMC Yukon, and 1998 GMC Suburban. However, it is still accessible from the selected car via links, so may be relevant.

If PCM was replaced, the PCM must be programmed. If PCM is not programmed, a Diagnostic Trouble Code (DTC) will be set in the PCM.
Ensure battery is fully charged. Ensure cable at Data Link Connector (DLC) and power supply for scan tool are properly connected. Turn ignition on. Perform EEPROM programming using the Techline equipment manufacturer's instructions and latest software applicable for the vehicle model.
NOTE: If PCM programming fails, ensure all electrical connections on PCM are okay. Check Techline for latest software. If EEPROM programming still fails, replace PCM.
Perform password learn procedure for anti-theft system using proper procedure. Once PCM is programmed, if only the PCM was replaced, go to next step. If the crankshaft position sensor, engine or PCM with fuel injection pump were replaced, perform TDC offset learn procedure.
Start engine and warm engine until engine coolant temperature is at least 170°F (77°C). This will allow TDC offset to be programmed into the PCM if necessary. The PCM has the ability to determine the amount of offset required to bring the engine to TDC. PCM uses the TDC to determine proper fuel injection pump timing. If TDC offset is not programmed, a Diagnostic Trouble Code (DTC) P1214 will be set in the PCM.