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  1. R

    What's up with all these codes? 2006 LBZ

    BINGO - YOU WIN THE GRAND PRIZZE!!
  2. R

    What's up with all these codes? 2006 LBZ

    Disconnect the negative cable on both batteries for 15-20 minutes then reconnect and see if there is any improvement. Beyond that, I think you should leave it alone so that the diesel guy has a chance of seeing what the problem is without having to fix something additional that you did while you...
  3. R

    Rail Pressure...P1093...

    Some info for you
  4. R

    Fuel injector knock

    Some basic about the EGR system in the attachment
  5. R

    Service Brake System message

    Yes. You could do the other side also, if you wanted to be thorough.
  6. R

    Service Brake System message

    Follow the negative cable down to the side of the block near the front of the engine, remove the bolt, and use a wire brush on the block and cable end until shiny. Replace the cable and bolt and tighten. Very easy to do. I can't say it will help, but you will know for sure that the ground is as...
  7. R

    Fuel injector knock

    Our trucks normally will have a MAF reading of close to 40 gm/sec with the EGR closed. Your reading sounds like the EGR may be open to some extent. When the EGR opens, the MAF reading drops because that exhaust gas bypasses the MAF sensor. There have been several posts over the years about MAF...
  8. R

    No start issue.

    Does that truck have remote start by chance? Passlock Interface For Remote Start/Stop PURPOSE The information below outlines a procedure to disable the Passlock Theft Deterrent for C/K trucks in which remote start/stop applications are required. This procedure is required because a remote...
  9. R

    No start issue.

    You shouldn't have 23K rail pressure when cranking. Sounds like FPR is not connected or getting power or ground.
  10. R

    Service Brake System message

    What you are trying to do is to test both batteries after being charged (after driving). They should have nearly the same charge. If you let the truck sit overnight, the batteries should retain their voltage. If you have a parasitic draw, the draw should draw down both batteries because they are...
  11. R

    Service Brake System message

    You might want to disconnect the negative on one of the batteries overnight and then test the next morning, checking both battery voltages. Then switch the next night and retest the other battery the next morning again. The 2 batteries should have almost the exact same voltage. I suspect they...
  12. R

    U0101 issues

    DTC U0101 00: Lost Communication With TCM This can be very hard to find where the problem is, but usually easy to fix the problem, ie broken wire, bent pin, etc
  13. R

    P2610

    A little more info
  14. R

    HELP Transmission

    See the attachments, follow the decision tree.
  15. R

    OBDII "Not Ready" for SMOG TEST

    https://www.gm-trucks.com/forums/topic/247108-ckp-replacement/ Scroll to near the bottom and look for info on getting the drive cycles completed
  16. R

    coolant fan relay location

    There is no coolant fan relay. No electrical connection at all to the fan clutch like in later models. It is purely driven by temperature. You probably need to change the fan clutch itself.
  17. R

    Lb7 and LLY UNDERHOOD FUSE PANEL CONNECTIONS!!

    It's all in here https://www.gmupfitter.com/wp-content/uploads/2021/05/2006_LD_CKFullSizeElectrical.pdf
  18. R

    L5P Coolant drain and fill

    I don't have a picture but there should be block drains on the block which look like bolts where nothing is attached. They are on the sides of the block below the exhaust near the bottom of the casting.
  19. R

    Efi live question motors lmm 07

    Is your truck at the only place in town where there is a diesel mechanic? Or auto diagnostician? Just because you can't communicate with the ECM/BCM doesn't necessarily mean that they're bad. Your problem COULD BE the ECM or BCM but without proper diagnostic evaluation, you'll never know. Lots...
  20. R

    2005 Chevy kodiak 4500 Shutting Down

    Not likely. More information here https://www.justanswer.com/chevy/6c75h-chevrolet-silverado-3500-2005-chevy-3500-duramax.html
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