A year ago, I had a problem starting my car (a 2004 Chevrolet Impala, about 120,000 miles). When I put the key in the ignition, the engine wouldn’t turn. I knew there wasn’t a problem with the battery because my lights, radio, etc. were still operating fine. Instead, I got a bright flashing “SECU…

For future reference…Just because your lights and radio work…a non-start problem could still be the battery. Starting a car requires HUNDREDS of amps…while running the lights and radio only require MAYBE 20 amps. But I don’t think this is a battery problem because you’re able to start it after a li…

Google PASSLOCK and find hours of reading enjoyment (assuming you enjoy poking sticks in your eye;). I’ve fixed dozens of GM security issues from the early days of VATS to the PASSLOCK II system. You can fix or even bypass it for much cheaper than the dealer quoted. Since you’re young, in school and…

Lots of people describe cranking but not starting as won’t ‘turn on’. Later, he says ‘won’t start’ so I believe it probably is cranking but not starting. The key point is the security indication on the dash display. That only happens when the system detects a fault. I have never seen a GM PASSLOCK…

Weird there is no edit icon in the mobile version… I meant to also say that the ECM inhibits more than the pump. The injector pulses and ignition are also disabled. It wouldn’t be hard to defeat if all you had to bypass was the pump and those other functions are easy to include making it much harde…

This happened to my daughter’s 2007 Impala… Including the SECURITY message on the display. A new battery fixed the problem. While that may not be your problem, it’s an inexpensive place to start.

Turn your ignition to the on position. Wait until the Security light stops flashing. (About 5 mins ) then turn back to off. Then try starting. This always works for my 2004 Chevy Impala. This is what I am doing at this moment. And YES. It just started! Works every time. Good luck!

VOLVO_V70: 6 years late , Dan. Well, just to be fair, perhaps the OP has been sitting next to his/her computer, while enduring a malfunctioning/nonfunctioning car for the past 6+ years, in the hope that someone finally comes to his/her rescue. Now he/she can at last get that car running af…

Ignition and Security Warnings in '04 Chevy Impala

Maintenance/Repairs

CCCommander35 March 27, 2012, 12:07am 4

The OP says the engine doesn’t turn…does that mean turn, as in crank, or turn over? I don’t own anything with Passlock but I thought the system shut off the fuel pump on offending attempts to start the vehicle…shouldn’t the car crank and run for a couple of seconds and shut off?

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Ignition and Security Warnings in '04 Chevy Impala

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