GM Service Manual Online
For 1990-2009 cars only

Rear Body Control Module Programming NON-XUV

  1. The liftgate module (LGM) must be programmed with the proper RPO configurations. The LGM stores the information regarding the vehicle options. If the LGM is not properly configured with the correct RPO codes the LGM will not control the features properly. Ensure that the following conditions exist in order to prepare for the LGM programming:
  2. • The battery is fully charged.
    • The ignition switch is in the RUN position.
    • The data link connector (DLC) is accessible.
  3. Follow the instructions on the Techline Terminal and scan tool to program the LGM.
  4. If the LGM fails to accept the program, perform the following steps:
  5. • Inspect all LGM connections.
    • Verify that the Techline Terminal and scan tool have the latest software version.

If the liftgate module has been replaced, you must also reprogram the key Fobs.

Rear Body Control Module Programming XUV

Keyless Entry Transmitter Programming

If the endgate module has been replaced, you must reprogram the keyless entry transmitters. Refer to Transmitter Programming

Window Learn Cycle Conditions

The endgate module window learn cycle must be performed whenever the following conditions exists:

    • A service part has been installed in the vehicle. The endgate module needs to learn window position and VIN for that vehicle. The learn procedure accomplishes both.
    • Loss of battery while the window is moving--This condition causes a window fault state because the module would not have been able to write the new position information in electrically erasable programmable read only memory (EEPROM) prior to the disconnect.

       Important: A battery disconnect when the window output is inactive will not cause a fault state.

    • Any fault condition, DTC B3966, which causes the window to enter the window fault state such as:
       - Out of range position--In most cases, a window re-learn will correct this issue with no other action required.
       - Open and or short circuits on the hall signal, hall sensor source or hall sensor return, or a faulty hall sensor--In this case, the circuit fault must be repaired before the window can be successfully re-learned.
    • Installation of a new window regulator into a vehicle--This condition should be re-learned via the scan tool. The manual learn will only re-learn position if the window is already in a fault state.

Window Learn Cycle Manual Learn Procedure

Important: The driver information center (DIC) will display the message See Manual - Tailgate anytime a learn is required except after the installation of a new regulator. When a module is not learned, or in a window fault state, only the window remains functional.

  1. Activate the window up switch using the key cylinder or overhead console switch and maintain switch activation for 2 seconds after the window has stalled in the fully closed position.
  2. Important: The window may be in any position to start the re-learn, but the up operation must be performed first.

  3. Activate the window down switch and maintain switch activation for 2 seconds after the window has stalled in the fully open position.

Window Learn Cycle Scan Tool Learn Procedure

Follow the instructions in Special Functions on the scan tool to perform the window learn cycle.