Ok well due to a unforeseen turn of events .... I now have no keys for my K5 as somehow they fell off my key-chain somewere so now I'm stuck with the task of putting in new lock cylinders in the truck ... now my question is what is the best way of replacing the Ignition lock cylinder with no key?

 

Well, from the looks of it, you have two options. Drill the lock or find a lock smith. The lock cylinder needs to be rotated to the run position before you can remove the retaining pin, thereby facilitating the removal of the cylinder.

 

Man that sucks.
My dumb-**** locked my keys in my Yukon in the parking lot at college, with it running of course, and 5 minutes to get to a final. Luckily she was still there when I got out. Needless to say could have done better on that exam...LOL. I now own 2+ magnetic spare key boxes.