I have a 98 Sunfire that I've been battling a VERY intermittent security/passlock issue. It will randomly not start every 1-2 months. I've checked all the normal problems with these cars but it's so intermittent I haven't been able to find it.

When I disabled the passlock in the tune and uploaded it. It took the tune but the the cluster stops working. I can flash it back to stock and the cluster works again.

This is my wife's car and it's going to leave her stranded somewhere one of these days and she is going to kill me.

Has anyone ran into this? It seems like the CAN BUS stops working when I disable the Passlock.


The only thing I changed was in System>General>VATS fuel cut B

Is that the proper way to disable it?

Thanks for any help. I've been fighting this issue for months now.