GM Module Replacement Instructions

GM Module Replacement Instructions

GM Overview

PCM/ECM

After replacing a PCM/ECM on a vehicle equipped with the security system "VATS", the engine will not run "code P0513,P0633 and P1631" until Passlock security relearn is performed (1.1). (except for when PCM/ECM is ordered with disabled "VATS"). Also, when DTC P0315/P1336 are diagnosed a crankshaft position system variation learn is required (1.2).

If your ECM comes with an IMMO CODE, a key programmer, locksmith, or GM SPS2 is typically required to complete the installation — or you can use our Auto 101 GM Tool for a faster, easier solution.

BCM 1999-2006

After replacing a BCM on a vehicle equipped with the security system "VATS", a Passlock security relearn will be required (1.1).

BCM 2007+ / FUSE BOX 2004+

After the BCM is replaced, the airbag indicator light may remain ON (code B1001). SDM relearn would be required to clear B1001 code (1.3). Also, if the vehicle is equipped with a Brake Pedal Position (BPP) sensor, the brake light and ABS/ESP light may remain on, (BPP) sensor calibration must be performed (1.4).

(1.1) 30-Minute Learn Procedure (Passlock security relearn)

Turn ON the ignition, with the engine OFF.

  1. Attempt to start the engine, then release the key to ON; the vehicle will not start.
  2. Observe the SECURITY light. After approximately 10 minutes, the security light will turn OFF.**
  3. Turn OFF the ignition and wait 5 seconds.
  4. Repeat steps 1 through 3 two more times for a total of 3 cycles/30 minutes. The vehicle is now ready to relearn the PasslockTM Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK.

Important: The vehicle learns the PasslockTM Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

  1. Start the engine. The vehicle has now learned the PasslockTM Sensor Data Code and/or password.
  2. With a scan tool, clear any DTCs if needed. History DTCs will self-clear after 100 ignition cycles.

🎥 For a visual guide, watch the video below:

(1.2) Crankshaft Position System Variation Learn (P0315/P1336)

If you don't have a scan tool, click here to learn about our app and affordable scan tools option.

Before you start!

  • Block drive wheels.
  • Set parking brake.
  • Apply brake and hold.
  • Cycle ignition from off to on.
  • Start engine and idle.
  • Turn A/C off.
  • Vehicles must remain in park or neutral.

After these are done, proceed to the relearn instructions below.

  1. Install a scan tool.
  2. Monitor the PCM/ECM for DTCs with the scan tool. If other DTCs are set, except DTC P0315/P1336, refer to the Diagnostic Trouble Code (DTC) list for the applicable DTC that set.
  3. On the scan tool, Select the crankshaft position (CKP) variation learn procedure.
  4. Follow the instructions on the scan tool.

🎥 For a detailed visual explanation, please refer to the video below:

(1.3) Inflatable Restraint Sensing setup SDM/Airbag (B1001)

If you don't have a scan tool, click here to learn about an app and affordable scan tool option.

  1. Key on, Engine off.
  2. Use a scan tool to perform the "Setup SDM Primary Key in BCM" Special Function in Module Setup.
  3. Clear all codes and verify no current faults are present.

🎥 For step-by-step guidance, watch the video below:

(1.4) Brake Pedal position Sensor Calibration

  1. Key on, Engine off.
  2. Clear all DTCs before proceeding.
  3. Use a scan tool to perform the "Brake Pedal Position Sensor Learn" under BCM, Configuration/Reset Function.
  4. Clear all codes and verify no current faults are present.

Important Notes

*The 30-Minute relearn procedure does not work on some GM vehicles. For these vehicles a Vehicle Theft Deterrent Learn (V.T.D) /Immobilizer System Component Programming (IMMO) must be performed via GM SPS2. "Vehicles that's equipped with IMMO could also be programmed by a locksmith — or you can use our Auto 101 GM Tool to complete the relearn"

**If the security light doesn't turn off then you may need to perform V.T.D/IMMO via GM SPS.

Global-A Vehicles required IMMO relearn (key reprogramming). A key programmer, locksmith, or GM SPS2 will be needed to perform this relearn— or you can use our Auto 101 GM Tool to complete the relearn easily and efficiently.

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