2002 chevy silverado wont start security light stays on without key in ignition

What is your question?

My truck just died while I was driving it down the road and it has not ran since my security light won't go off even with the key out of the ignition and I have not had no luck at all with getting it to crank over and I've changed the crankshaft position sensor change the starter and spark plugs and wires all new don't know what it is or what it could be if anybody has any useful information please HELP ASAP

How long has your 2002 Chevrolet Silverado 1500 had this problem?

months