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  1. R

    Transmission problems -- P0722

    Info on both DTC's to see what the difference is
  2. R

    P2227 BARO Code Troubleshooting

    Did you test the BARO circuit? https://www.duramaxforum.com/threads/p2227-code-will-not-clear.649809/
  3. R

    Error code meanings

    This website publishes Bulletins issued by GM to tell the techs what to look for based on DTC codes. Look your up here and see what info you can gain from them. https://www.dtcdecode.com/Chevrolet If you want definitions, just google 'Duramax dtc Uxxx' substituting your actual code
  4. R

    Lift pump

    Can you remember when your truck ever used 100 gallons of fuel in 1 hour? For me and my 2008 LMM, that's about 3 fillups after the original tank was drained.
  5. R

    PO8077 P08078 Code

    SPAC = ??? Please translate for us
  6. R

    need help on Allison update

    Perhaps the attachments will provide some direction.
  7. R

    How to plug 01 LB7 sensor hole

    Call the maker of your kit and ask them. If it isn't in the instructions, it should be.
  8. R

    Soft C0035, C0055 codes as soon as you turn the key on.

    See attachments. As you will see, there is a more refined DTC code that can be discovered if your scan tool has the ability. Knowing this 'sub code' (not sure of the correct nomenclature for this) very well may help you to determine more closely what the exact problem is, or what to look for...
  9. R

    P0406 wont go away

    See here https://www.dieselplace.com/threads/map-sensor-pt-09350899.415076/ for a little more info.
  10. R

    P0406 wont go away

    The attachment is the only thing I can find in LB7 Wiring diagrams. I don't understand the squiggly line inside the 3 vents/valves lower right side of diagram. Maybe that's how they indicate a solenoid (or other devices). But there is A side and a B side.
  11. R

    P2227 BARO Code Troubleshooting

    Maybe a mistype of the code #?? ChevroletP0227 Chevrolet DTC P0227 Make: Chevrolet Code: P0227 Definition: Accelerator Pedal Position Sensor 3 Low Input Description: Key on or engine running; and the...
  12. R

    No crank issue with ITBC plugged in

    Did you program the new TBCM when it was installed?
  13. R

    P0406 wont go away

    I have no specific knowledge about that part (vacuum chamber I think), but if something is broken off, I'd replace it. I know they're fairly expensive, but not as much as a diag at the dealer.
  14. R

    Help with engine power reduced

    If the scan tool has both pedal readings, it might be interesting to look at them, you may have some information you can use to determine the problem. See here:https://www.duramaxforum.com/threads/throttle-position-sensor.967105/
  15. R

    Help with engine power reduced

    Actually, that was from my now expired subscription to ALLDATADIY. I'm still trying to figure many things out myself. Lots of very knowledgeable guys on this forum to learn from.
  16. R

    Help with engine power reduced

    One thing that can cause the MAF reading to be low is that the EGR valve is open at least more than it is supposed to be. Another cause is that the intake air tube is larger in diameter than stock which skews the MAF reading, such as an aftermarket intake.
  17. R

    ACDelcotds.com and tech2win help

    Sounds like GM needs some programming help. Shouldn't be that hard.
  18. R

    iat sensor

    See attachment. Test powers and grounds before buying a new sensor
  19. R

    low pressure fuel leak got me stumped

    Is your Airdog actually running and pumping? And is the fuel reaching the filter? Sounds foolish to suggest, but sometimes you need to start with simple. Like James said, try different spots. Choose the easy spots to start with.
  20. R

    Fuel pressure regulator

    See this post https://www.duramaxdiesels.com/forum/threads/need-some-serious-help-diagnosing-fpr-rail-issue.71215/post-998089
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