2013 Chevrolet Impala LSFACTORY OEM SERVICE PROCEDURE

Initialization and Re-initialization

WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.

When the sunshade/sunroof controllers are not Initialized they will perform all open requests, but no express close or LIN-Bus communicated close commands. It will only perform a 'Close' operation requested by the switch with obstacle detection disabled. If an initialization procedure is interrupted the controllers will return to the not initialized state. Which procedure is run depends on the state of the controller.

For a module which is not initialized begin the process hold the sunshade/sunroof switch in the 'Close' position. The sunroof/sunshade will move to the end of physical travel in the closed direction and store that position. The rest of the defined positions are determined by offsets from this home position. At the completion of the procedure the sunroof/shade should back off slightly to its soft stops.

For a module which has been previously initialized release the switch after the sunroof/sunshade is considered fully closed by the software. Then hold the sunroof/sunshade switch in the closed position for 10 s. The sunroof/sunshade shall resume motion in the close direction until end of travel is detected. At the completion of the procedure the sunroof/shade should back off slightly to its soft stops.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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