Lexus did not make the GX470 in 2010. The last year of production was 2009. So, no, there is not a valet key for the 2010 Lexus GX470.
Only the dealership can cut a Lexus key because the chip that allows the key and car to communicate is part of the metal part of the key.
CR1616
CR1616
To change the battery in a Lexus RX350 key fob, start by using a small flathead screwdriver to gently pry open the key fob casing along the seam. Once opened, locate the battery, typically a CR2032 type, and carefully remove it. Replace it with a new battery, ensuring the positive side is facing up, then snap the fob back together. Finally, test the key fob to ensure it is working properly.
The key battery for the ls400 is PN# br1216 www.lextechautomotivellc.com
Open the key fob, remove the battery and look and see what size it is.
Open it up and check and see.
To unlock your Lexus IS250 when the battery is dead, use the mechanical key hidden inside the key fob. Press the small button on the back of the key fob to release the key. Insert the key into the driver's door lock and turn it to unlock the door. Once inside, you can jump-start the battery or replace it to restore normal functionality.
To change the battery in a 2009 Lexus ES350 key fob, first, use a small flathead screwdriver to gently pry open the key fob. Once opened, remove the old battery, typically a CR1632 type, and replace it with a new one, ensuring the positive side is facing up. Finally, snap the fob back together and test it to ensure it’s working properly.
Panasonic CR 1616
Car alarm in Lexus ES300 started going off at random when car was parked, not running. I changed the key fob battery (flat watch battery) with a new battery and it fixed the problem.