OK, this is not a G8, but it is a GM. I am working on a 2013 Chevy Malibu 2.5. (has the flip key) This thing has been a nightmare. Trying to make this short. I ended up finding out the computer was bad. I bought another and it was programmed wrong and sent it back and got another back today. No crank. security immobilized. Trying to do the key cycle to learn the key. No go. I have been working on this for over 2 months.

This computer has the security light and goes right out. It will not let me cycle the key to program the key. Just the flashing CEL light for the P0633 security code. The last computer let me program the key... Not this time.

I scan codes and getting a P0633 Immobilizer key not learned, and a crankshaft position sensor needs learn. The computer place I ordered from takes a long time and hard to contact. (Leave a message and some day they will call you back.)

Ok I found 2 very old threads. https://g8nation.com/showthread.php?t=22619 Sounds just like my problem. GTPprix sounds like he has a shop and can help. But looks like he hasn't been on here for quite a while.

Also a thread on the crank learn. https://g8nation.com/showthread.php?t=18098

Is there a decent priced programmer I can get to be able to do some of these things? Sweet if someone is very close to my area with one. I already paid a locksmith once on the old computer. He charged me once and the computer had the wrong vin. I hate to keep throwing money at this.

Any ideas what to do next?