This is a Factory OEM (Original Equipment Manufacturer) GM 3 Button keyless entry remote, aka "key fob". From a Chevy truck but Reprogrammable for other GM vehicles (see link below).
This remote key has 3 buttons, Lock, Unlock, Panic and comes with a battery CR2032, designed to work with vehicles that are equipped with a standard ignition key entry system, this key is not compatible with push-to-start cars.
for Re-Programming Instructions:-
https://www.keylessentryremotefob.com/10335582-88-oem-3-button-key-fob-circuit-board-with-new-remote-case/
$10. Please message me with further questions and see all pictures. Call/text show contact info
. Thanks for looking.