Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Programming The Pcm
This procedure is required when one or more of the following situations are true:
- A Powertrain Control Module (PCM) has been replaced.
- Diagnostic Trouble Code (DTC) P1602 - PCM Not Programmed is set.
- An updated calibration or software release is available for either the PCM or Transmission Control Module (TCM).
This procedure assumes that the scan tool is properly configured to the dealership network with either a wired or wireless connection. For help on how to network the scan tool, use the "Help" tab at the top of the diagnostic application.
Programming Procedure:
- Record the flash part number in the original PCM.
- Have the vehicle Personal Identification Number (PIN) available.
- Replace the PCM.
- Connect a battery charger to the vehicle.
- Connect the diagnostic scan tool.
- Position the ignition to the RUN.
- Manually enter the Vehicle Identification Number (VIN) in diagnostic scan tool to identify what vehicle you are working on.
- When the diagnostic scan tool successfully identifies the vehicle, locate the correct Flash. Flash the PCM software. Follow the diagnostic scan tool prompts. Cycle the ignition as directed.
- If required, perform the "PROXI Alignment Procedure " located in the "Vehicle Preparations" menu in the activities section of the left margin as well as under the Body Control Module (BCM) "Misc. Functions " menu.
- Navigate to the BCM "Misc Functions" menu and perform the "Transfer Secret Key to ESL ECM" routine. Enter PIN when requested.
- Navigate to PCM "Misc Functions" and perform the Learn ETC routine .
- Verify that the engine starts and runs.
- Module programming is now complete.
The "GSE Injector Adaption" scan tool procedure should always be run after a PCM is replaced on a vehicle with the 2.0L GMET engine. The procedures should be in the "Miscellaneous Functions" tab in the PCM. Failure to run the procedures may cause DTCs to set in the PCM.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
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.