How do you reprogram an astostart remote hst523?

To reprogram an AstroStart remote model HST523, first, ensure the vehicle is in the "Run" position without starting the engine. Press and hold the "Program" button on the remote until the LED indicator lights up, then release the button. Next, press the "Start" button on the remote; the LED should blink to confirm the new programming. If needed, refer to the user manual for specific programming sequences or additional settings.