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  1. R

    Allison tranny cooler line size?

    I'm pretty sure that the lines are larger than that, probably -10an (5/8"). I believe that someone posed a similar questin to Mike L about that a couple of years ago and he said that 3/8 wouldn't be enough flow and cautioned against restricting trans fluid flow in the cooling circuit..
  2. R

    2012 GMC 2500HD 6.0l battery drain

    So this truck you are working on is a gasser? What year? What model?
  3. R

    2012 GMC 2500HD 6.0l battery drain

    Sounds like the truck really isn't asleep. If you want to find out which circuits are problems, check both sides of a specific fuse, one voltmeter probe on one side of the fuse, the other probe on the other. If there is amps flowing thru the fuse, you will see the voltage. If no voltage, no amp...
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    p20EE nox sensor readings

    Here is some reading material for you: https://www.dtcdecode.com/Chevrolet/P20EE
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    Problems after dead batteries and jump start

    When your ABS brake light is on, that will also cause your Service Trailer Brake system in DIC to display. Fix the ABS system, the STBS message goes away also. As for the other w messages, you might want to look at the wiring diagrams offered at...
  6. R

    ABS-Brakes light on Intermittently

    Check powers and grounds for the EBCM. The main ground is on the outside of the frame, near the driver's feet.
  7. R

    Replacing Torsion bars and Leaf Springs

    Strange that yours has spacers, mine don't. Are you 4WD?
  8. R

    Replacing Torsion bars and Leaf Springs

    They are presumably the same part number, so they should be the same, not different. My truck doesn't have 1/8" spacers between the leaves, does yours? Let Amazon know that you have problems with the order. According to Dorman, the spacers shouldn't be there. Dorman 929-126
  9. R

    Transmission temperature rising...any ideas?

    This is what I was thinking of https://www.lubegard.com/products/kk/ It goes into the transmission fluid inlet in your radiator and also the external trans cooler in front of the cooling stack. The idea is to get out any material so that you have better fluid flow, and thus better cooling. Like...
  10. R

    P0756 & p0877

    See attachments
  11. R

    P0756 & p0877

    Any codes?
  12. R

    Sulastic shackles after 30k

    Sulastic shackles are warrantied for 3 years, free replacement.
  13. R

    Transmission temperature rising...any ideas?

    Check to be sure that your trans coolers (external as well as the radiator) are not somewhat blocked. The radiator cooler is often a 'catcher' of excess clutch material.
  14. R

    MAF readings

    Another discussion about this subject that may be of interest to you https://www.duramaxdiesels.com/forum/threads/p0102-wiring-good-replaced-maf-still-reading-0-00-g-s.88182/#post-1173323
  15. R

    P0102 Wiring good, replaced MAF, still reading 0.00 g/s

    The below is from the P102 information. I believe this is not understood, at least not by me. The ECM applies 5 volts to the MAF sensor on the MAF sensor signal circuit. The sensor uses the voltage to produce a frequency based signal on the inlet airflow through the sensor bore. The frequency...
  16. R

    MAF readings

    Make sure you are getting almost exactly 5V on pin 3
  17. R

    P0102 Wiring good, replaced MAF, still reading 0.00 g/s

    This is for my 2008 LMM. Pin 1 is the signal out, pin 3 is the 5V ref coming in.
  18. R

    Testing LML VPS to ECM

    See attached from https://www.gmupfitter.com/body-builder-manuals/
  19. R

    Still having trouble, need recomendations

    That's a great clue as long as it's repeatable.
  20. R

    P228B Please Help / Advice

    Maybe this?? https://www.duramaxdiesels.com/forum/threads/cp4-diagnose-p228c-p228b.84507/
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