Question about 2007 Chevrolet Silverado 2500HD

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Signal wire to starter in and out. starter ok. showed code po513 went back to dealer had computer reprogramed. still doing same thing. intermintted problem so hard to detecked.

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Your truck has the infamous Passlock anti-theft system. The ignition key has two small black rectangles with a small wire running down the length of the center on either side of the key shaft. When you insert the key into the ignition lock, the wires in the small black rectangles contact a sensor in the lock cylinder. These sensors complete a path to the Electronic Control Module (ECM), which tells the fuel and starter circuits to engage. If the key wires or lock cylinder sensor are damaged or dirty, the signal is not sent to the ECM, your truck will not start, and it may even die while running. The dealers remedy this by selling you a new ignition lock cylinder, and they cut a new key with the proper value to match the old key. This will run you $500 to $600 or more. There are ways to bypass your Passlock system, and several are detailed in Youtube videos. I'd suggest watching a few of them and determine which bypass method works for you. Good luck.

Posted on Oct 11, 2013

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Posted on Jan 02, 2017

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1 Answer

CAR WON'T START, TOOK IT TO THE DEALER AND THEY SAID WIRING PROBLEM. NO SIGNAL FROM THE TCM TO STARTER


The dealer should have a part number for the complete wiring that you need, but it may be a main harness which may require many hours to replace.

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My 2006 stratus waht start i have changed the Dis cap, wires, alternator and spark plugs. the battery is new and the sensors r good it fires but not turning over could it be the starter.


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Remote signal is not being received/responded to. Fuses and remote batteries OK have also tried reprogramming using valet key and get no flash from lights.


I had the same problem. I went to the dealer though because my blinkers were not working but the hazards were so I knew the lights were okay. It turns out there was an issue with some realy switch in the hazards. Once that was fixed then all of a sudden my remote signals came back to life. TRy that, good luck.

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Service Engine Soon


Hi,

A couple of things you can try:
  • remove the negative battery terminal to reset your car's computer. There are some car stereos that would require a security code when the battery is removed;
  • on your next fill up, try if you can get a higher octane gas instead of your normal, say if you use to put in 91, shift temporarily to 95;
  • add a can of injector/carb cleaner in your gas tank;
  • on a long stretch, drive aggressively and hard. The idea is to clean your fuel system, combustion chamber, valves, exhaust manifold, catalytic converter, exhaust system including your EGR and O2 sensors.
If error indicator persist, trace the EGR wiring with special attention to the connectors at the ends.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

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