Hey guys, I have a 98 Chevy k1500 z71. The problem I am having is that every once and a while my truck takes a while to start. When I put the key in and turn, the engine turns over, starts up, then immediately turns off. The security light blinks 5 times. This continues for anywhere from 10min to 45min. Then out of the blue the trucks starts and doesn't happen again for nearly a week. Here is what I know, I have checked fuses, disconnecting the battery, leaving key in for 5+ min, none help. Problem didn't happen until I had the ignition re keyed because the key had worn out. After doing some research I came to the conclusion that it could be the Pass lock? so I had the Chevy dealer replace it and they said that they had no idea what was going on, since it didn't happen while the truck was there. Here is a video of what is going on, http://www.youtube.com/watch?v=qqyrPGVU2l4 . This happen this afternoon, and now the truck WILL NOT START. If anyone can please give me guidence that would be awesome. Thanks so much for the time.