I lost my only car key's a while ago and I didn't know what to do? I considered all my options but I decided to Change the ignition lock housing cylinder and ignition lock. So I have 2 car keys that came with the new ignition lock but the car wont start. So basically my question is
1.Should I use a obd2 code reader to reset the ECU
2.Use a key programer to program the new keys
3.Tow my car to a mechanic and let them deal with it

Also I've given the car a tune up, changed the oil, and tested my battery,starter, and alternator. All came back working great. I NEED HELP PLEASE!!!!!

 

Hello Yung
the ignition lock cylinder contains a chip that needs to be recognized by the PCM and BCM to complete the VAT (vehicle anti-theft) process.
The fix requires you to complete a security relearn procedure. Follow this procedure and your car should fire right up.

Security Relearn Procedure:

1. Attempt to start the car by turning the key to the Start/Run Position.
2. Observe that the vehicle fails to start and that the security light is illuminated.
3. Release key to the 'ON/Accessory' Position. (DO NOT turn key to the 'off' position, DO NOT remove the key.)
4. Allow the vehicle to sit with the key in the 'ON/Accessory' Position for no less than 11 minutes (the security light should stop flashing, if not wait up to 3 more minutes).
5. Turn key to off position and allow the vehicle to remain in the 'OFF' position for no less than 30 seconds.
6. Repeat #1 - #5 for 3 cycles.
7. On 4th-5th attempt, car should start.

NOTE : Since this is a fairly long procedure, I would limit all electrical sources, such as disconnecting headlights, to prevent discharge of battery.

NOTE 2 : It is SAFE to wait LONGER than the allotted time, but it is not safe to wait less time. I.e. 12 minutes instead of 11 minutes should be safe; however, waiting 10 minutes instead of 11 minutes is not safe.

Properly executed, this procedure should take approximately 35 minutes to complete.

 

Just FYI for future reference or anyone else here, if lose keys any GM dealer can cut a new key from the VIN on pretty much anything from a 1990 model GM vehicle and up.
Takes them 5 minutes.

 

True !!! this happened to me once on a 1989 Olds that keys got locked into the Car while I was out on the road.
Also had extra sets on other cars made. at the GM dealer.