[mrb1ll]

I get the same problem but i've never determined the time in between occurances. I originally purchased my Silverado in 2002 in AZ and this happened to me a couple of times and then it quit. Then last year (summer or fall, I cannot remember), 2005, it left me stranded at a gas station. Since Christmas 2005, I installed a remote starter which required a by-pass module to get around the PasslockII fuel system cut-off. Since then, i've been stranded at least three to four times. Frustrated, I took it to the dealer who supposedly repaired the issue by replacing the ignition...repair in April. Unfornately, it has left me stranded once again. My best guess it is a flaw in the PasslockII anti-theft fuel cutoff. I'm planning on returning mine to the dealer again for another look. I've unplugged the battery for the typical 30 minutes to clear the computer memory but I doubt that had any effect. Does your security light come on while the vehicle is running? This is another indication the PasslockII is the issue. THat's about all I have. Good luck.