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  1. R

    Security light won't turn off!!

    Light never goes off. Like all the videos I've watched.
  2. R

    Security light won't turn off!!

    2012 security light won't go out, tried the leave the key on for 10 minutes, but light never turns off no matter how long key is. At first security comes on than will turn off for a split second than Back on and stays solid . Won't crank either. Battery and cables are new. Can't seem to find...
  3. R

    2011 Tahoe no crank no start need help

    Well figure that out wire wasn't seated completely, but didn't fix the issue. Only other thing I can do is find a wire diagram for all the grounds make sure they are clean and good.
  4. R

    2011 Tahoe no crank no start need help

    That's a good diagram but can't figure out where it hooks to on the fuse block. The red and white wire. Others are labeled. But that one isn't for some reason
  5. R

    2011 Tahoe no crank no start need help

    Thank you very much, i'll check these out tomorrow. It's almost like when radio HVAC lights all cut out when in crank position.
  6. R

    2011 Tahoe no crank no start need help

    Good idea, I'll give it a check
  7. R

    2011 Tahoe no crank no start need help

    Yup scanner cranks it. Turn key nothing. It is a new ignition switch, but maybe bad out of the box. It's a gm part not a cheapy
  8. R

    2011 Tahoe no crank no start need help

    Fixed the wire didn't fix the problem, but I checked my ignition wire under column while cranking it drops to 0 volts. When I let off back to 12.5 volts? Red with white stripe wire. So something is pulling down the network??!!
  9. R

    2011 Tahoe no crank no start need help

    Small update... Found a bad wire drivers side by the transmission. Yellow with black stripe. Corroded bad from rubbing. Ran out of time to fix it. Probably have time tomorrow
  10. R

    2011 Tahoe no crank no start need help

    The yellow/black wire sends power I believe to starter relay. Ya your right it's probably something simple I'm not finding. I'd think if there was a bad wire somewhere it would blow a fuse. But who knows
  11. R

    2011 Tahoe no crank no start need help

    Yellow wire from fuse box to ECM. My scanner can crank the engine. It cranks but doesn't start. Fuel pump primed, but no spark or injectors. Or if just rig a push button start and be done with it haha. Well I've learned a lot on this adventure canbus system. The more you know
  12. R

    2011 Tahoe no crank no start need help

    Excellent thank you very much for your help. I think I need a shop. Checking voltage today I discovered I have no power to the yellow power relay wire. The head scratcher is no fuse is blown. I tested right at the bottom of the fuse block nothing zero volts
  13. R

    2011 Tahoe no crank no start need help

    It's good. Starter works jumping relay. I think your right. Something isnt fully programmed. I don't have the equipment to program. Maybe I can just bring the ECM and bcm to them to test. I'm not sure.
  14. R

    2011 Tahoe no crank no start need help

    Yes it does, says crank signal yes as I turn the key. Crazy everything seems like it should turn over but doesn't. Can bus lines are all good 60 ohms battery disconnected. It's gotta be computer problems.
  15. R

    2011 Tahoe no crank no start need help

    No it doesn't, no power to purple wire. So bad bcm or theft deterrent... Light won't go off.
  16. R

    2011 Tahoe no crank no start need help

    To ad scan tool says everything should be good to go. 5v reference good, crank signal yes, theft deterrent inactive. Everything says it should start. What a head scratcher. I'll take pictures and post maybe missing something important.
  17. R

    2011 Tahoe no crank no start need help

    Thank you very much!!!! Starter solenoid does not click. So I'll go through the troubleshooting above and report back. It does have a new programmed ECM. But could possibly be the Bcm causing the problem. Im currently troubleshooting the gmlans high and low. But everything seems to be...
  18. R

    2011 Tahoe no crank no start need help

  19. R

    2011 Tahoe no crank no start need help

    Does have new ignition and theft module. Something is off though cannot get security light to turn off
  20. R

    2011 Tahoe no crank no start need help

    Ya I jumped pin 30 to 87. It also turns over with scanner command mode
  21. R

    2011 Tahoe no crank no start need help

    Found this interesting no codes on scanner to reference.
  22. R

    2011 Tahoe no crank no start need help

    Found a tan/black wire towards the back wire harness that had been cut than reconnected. I believe this is a gmlan + wire. But not for sure
  23. R

    2011 Tahoe no crank no start need help

    Ordered a mid level scanner. Should help
  24. R

    2011 Tahoe no crank no start need help

    I did
  25. R

    2011 Tahoe no crank no start need help

    I have tried this a few times but security light never turns off just stays lit

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