Does the truck have the original ignition switch? Did they add a push button to engage the starter? You'll want to look at an original wiring diagram to see what has been changed on your wiring harness.
No it looks like they changed the ignition switch because the key looks weird and small and does not require any button to be pushed to engage the starter. You just have to turn the key and give it gas. Where can I get a diagram of the original wireing?