2007 GMC Sierra 1500 Logo
Gina Lopez Posted on Aug 30, 2014

My 2007 gmc just stopped running one day so i replaced the starter and im stillvhaving the same problem. it wont even turn over

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Backyard_Jim

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  • Posted on Nov 26, 2014
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Hi,
Try moving the shift lever in and out of gear and back to Park then try it. Have you tried starting the truck with the shifter in Neutral? If it turns over and starts, I would check the Neutral Safety Start Switch and it's connection down under on the side of the transmission? If you are experiencing lights and dashboard indicators coming on when inserting the key in the ignition but zero response from the solenoid on the starter or the starter turning over when turning the key switch to the start position, I would definitely check the Neutral Safety Start Switch. This switch is the one that allows you to start the vehicle by making sure you are in Park or Neutral. It's in a location on the side of the transmission where salt, sand and corrosive road debris can get trapped that eats away at wires and connections.

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  • Posted on Oct 13, 2023
Timothy Kellum
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Where the neutral flight to switch have anything to do with the security not starting it

  • 1 more comment 
  • Jeff Armer
    Jeff Armer Oct 13, 2023

    Anti-theft system (immobilizer) Does not disable the starter, just disables the fuel injectors.

    The immobilizer system functions are provided by the theft deterrent module (TDM) and the engine control module (ECM). When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the head of the key is energized by the exciter coil surrounding the ignition lock cylinder. This exciter coil is part of the TDM. The energized transponder transmits a signal that contains its unique value, which is received by the TDM. The TDM then compares this value to a value stored in memory. If the values match, the TDM will send the prerelease password via the serial data circuit to the ECM. If the transponders unique value is incorrect, the TDM will send the fuel disable password to the ECM.

  • Jeff Armer
    Jeff Armer Oct 13, 2023

    (Where the neutral flight to switch) What ???? ,do you even know what your talking about ?

  • Jeff Armer
    Jeff Armer Oct 13, 2023

    Why are you answering a post from Aug 30, 2014 anyway.

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