I have a 2007 GX470. But only one remote. I bought a OEM Lexus remote 89070-60801 off ebay. I took it to a locksmith to cut it and program it. The programmed the chip to be able to start the car and manually work the locks. But the could not program the FOB remote lock/unlock functions.

I tried the instructions found elsewhere in the forum for DIY programming FOB involving, inserting the key, opening and closing the door, etc. Also, no success despite many tried at this. In the end I get two locks/unlock telling me it was unsuccessful.

Any other suggestions?