You will have to have the key or reprogrammed the switch also

The key and the immobilizer unit you have from the other vehicle ,but you didn't take the HEC /HIGH ENERGY INSTRUMENT CLUSTER THIS IS ALSO PART OF IT YOU MIGHT FIND THAT AFTER PROGRAMMING THE KEYS IN IT STILL WON'T START IF THIS HAPPENS WHILE THE LOCKSMITH IS THERE DON'T LET THE GUY GO NUTS TELL HIM THAT YOUR MISSING THE HEC//////THE SYSTEM ON THIS VEHICLE YEAR INCLUDES THE DASH CLUSTER YOU INSERT THE KEY AND TURN IT THE PICK UP RING SEE'S THAT THERE'S A CHIP THIS ENERGIZES THE IMMOBILIZER WHICH SENDS THE KEYS CHIP CODE THROUGH THE CLUSTER IF IT MATCHES IT GOES TO THE COMPUTER AND IS CHECKED FOR A MATCH AGAIN AND IF THAT KEYS IN THE SYSTEM THE PCM ALLOWS YOU TO START THE CAR SO YOU WILL STAY IN THEFT MODE UNTIL EVERY UNITS KEY CHIP CODE MATCHES ,THE LOCKSMITH MIGHT BE ABLE TO COMPLETELY ERASE THE WHOLE SYSTEM AND REPROGRAM IT WITH THAT SAME KEY AGAIN BUT I DON'T THINK SO I THINK THIS IS A DEALER TRIP WITHOUT THE HEC

Anti-theft system ,need to have key programmed to the vehicle . Time to call a mobile lock smith or have it towed to the dealer .