1998 Cadillac Catera

Computer problem
1998 Cadillac Catera 6 cyl Two Wheel Drive Automatic 74000 miles

i redid the head gasket car ran on way in did the gasket now car wont start seems to be a security issue was wondering if there is any codes I can try by myself without having to take to the dealership I tryed the two that were in the owners manual if anyone knows any possabilitys please let me no
October 21, 2010.

Not really fully understanding your concern, and unsure what the two in the owners manual are. I can say if you have a fault with it starting and it is a security concern, a scan tool is going to be your best option. I am not sure if there is something out there in the independent world that can access the system, you may need factory assistance.

Oct 21, 2010.