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HOMESERVICE MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 101 (COMPUTER RELEARN PROCEDURES)COMPUTER RELEARN PROCEDURES - TRUCKS & VANSFORWARD CONTROL & MOTORHOME CHASSISPOWERTRAIN CONTROL MODULE (PCM) PROGRAMMING (6.5L NON-TURBO DIESEL WITH ELECTRONIC FUEL INJECTION (EFI) & 6.5L TURBO DIESEL)
1998 Chevrolet Suburban K2500, 7.4 J, Part Time

Powertrain Control Module (PCM) Programming (6.5L Non-Turbo Diesel With Electronic Fuel Injection (EFI) & 6.5L Turbo Diesel)

1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Powertrain Control Module (PCM) Programming (6.5L Non-Turbo Diesel With Electronic Fuel Injection (EFI) & 6.5L Turbo Diesel)
WARNING: This page does not describe the selected car, but rather 69 other vehicles, including the 1999 Saturn SW2, 1999 Saturn SW1, 1999 Saturn SL2, 1999 Saturn SL1, and 1999 Saturn SL. However, it is still accessible from the selected car via links, so may be relevant.
  1. 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.
  2. 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.
  3. Once PCM has been 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.
    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.
  4. 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 offset 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.
NOTE: PCM will only perform an auto learn when a TDC offset is not present (new or reprogrammed PCM).
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.