I lost my truck's keys and it's locked, need to get into it to change ignition.

You will either need to pay a lock smith to cut a new key or many times it is easier to buy a new set of locks and ignition switch with a key off of ebay and just change everything out.

The barrel key and ecu need to be calibrated together. You will need to get a mian dealer to do this.

You cannot its that simple you need to chenge the whole steering lock you cannot change the barrel without the original key

A key code is stamped on the lock cylinder to aid in replacing lost keys.

it may work out cheaper to have a locksmith cut new keys for you, talk to one & explain the situation & see what can be done, if you change the ignition switch you will have to change all the door locks & the trunk lock as well.........hope this helps......cheers.

try locking and unlocking drivers door lock with the key

try putting key in ignition turn to on position
then press lock & unlock several times slowly if door locks cycle up & down after 1st press it lost code and is now resynconised.
now try remote with all doors closed and key out of ignition
if this dont work need to register key(program)back into system which dealer must do with Tech2 if round heart shapped remote

be for you replace ignition key. try going to a ford dealer.bring your reg and see if they can punch a key out for you. if not try to find a lock smith to make a key.if no luck you can replace it the switch cost about $25.00

Well,

From what I remember you need to put the missing key in and then press the cylinder release, a small hole by the ignition switch. Without the key, I guess you would need a locksmith to turn the tumbler then press the switch. Lock pick set anyone?