I bought my Grand Am GT 2005 a 2 months ago. It has been an excellent car up until about a week ago when intermittently, the battery would be dead when I went to start it (even if it was only shut off an hour earlier). I took it to a repair shop and they diagnosed it as a simple dead battery. So, I bought a new battery that day and the next, I swopped it out. Now up until taking the old battery out and putting the new one in, everything worked perfectly. The radio worked, I had no error codes or lights, it started on one crack. But after installing the new battery, my car won't start. I have tried numerous different things so far and non have seemed to help. When the key does into the ignition, the dadh lights up for a quick second and then all lights turn off except for Service Engine Soon. There is not flashing security. The radio only displays the time, won't turn on or tune to any stations. When I turn the key to START there is no sound. No crack, no fuel system, nothing but relays clicking. What I have also tried is jumping the starter, which when I touch the neg, and pos with a prydriver, it turns over, ignites, runs for 3 seconds, and then shuts off. I am at a complete loss. Please, I could realllllyyyyy use some insight! Regards.

  • security light flashing?
    – Ben
    Commented Sep 16, 2016 at 20:05
  • No, it doesn't not even come on.
    – Tomas
    Commented Sep 16, 2016 at 20:40
  • 1
    do you have a scantool that will view live data? check for the engine crank request pid when the key is in the start position. is there a starter relay? or is the starter computer controlled? if there is a relay pull it and check that the computer is grounding the coil. how about the fuses? check all the underhood and in dash fuses with a multimeter.
    – Ben
    Commented Sep 16, 2016 at 20:44
  • Unfortunately I am at school for about another hour, I'll get back to you ASAP.
    – Tomas
    Commented Sep 16, 2016 at 20:49
  • That said, I tried using an engine code already and it would not even connect to the ECU.
    – Tomas
    Commented Sep 16, 2016 at 20:50

2 Answers 2


SOLUTION: Resetting the internet computer PCM AND BCM by touching positive and negative terminals together for 1 minute! Started right up, one crank. Thanks for all the help!


Could you give a but more information on your solution please? I have a 2004 grand prix that im not able tp figure it out, I replaced the Started, BCM & Ignition switch and still haven't gotten any luck. I would like to try your solution but where exactly are the wires that I need to touch together.

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