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  1. R

    FICM Failure??? Code P1658

    Wiring diagrams available here: https://www.gmupfitter.com/pdflists/view/6
  2. R

    could low fluid cause limp mode

    See attached
  3. R

    Code P2610 ECM/PCM Internal Engine Off Timer Performance

    See attached. Note information near the bottom specifically for this DTC. Either an easy fix or you likely need a new ECM
  4. R

    Negative Desired Fuel Rail Pressure

    I was about to ask what kid of a scope you were using to see your fishbite, but I see where you got your information. I think there is likely a circuit problem for the FRP Sensor. It seems to work and then just drops out entirely, as if it were shorting. That's where I would spend my time in...
  5. R

    Dave

    See attached. Eventually this needs to be fixed. Drive it reasonably and it will probably last longer. Get a scanner that will read and clear codes from your ECM.
  6. R

    New member here. First Duramax 2007.5 need transport and mods

    Before you rip into that new truck with 'improvements' and modifications, drive it fo a while and see if it is really as good as you think it is now. Make sure it's reliable in it's present state. No use throwing money at a truck that needs more work than you're willing to pay for.
  7. R

    lmm po301 code

    You have a mis-fire on cyl #1. Fuel Injector Balance Test with Tech 2 Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. See: Testing and Inspection\Initial Inspection and Diagnostic Overview Review Strategy Based Diagnosis...
  8. R

    P0700 and P0877 while towing heavy and typically uphill

    See attached.
  9. R

    How's everyone doing with this virus crap?

    I haven't had a hair cut in over a month, but today was my day. The barber was talking about being 'off work' to the previous customer. I overheard the conversation. The barber had covid confirmed by the local hospital for 11 days. He did not have problems breathing so they didn't hospitalize...
  10. R

    How's everyone doing with this virus crap?

    Just got news a couple of days ago about a relative in my extended family with Covid. He is a dad raising 2 early college kids. He is in the hospital and now on oxygen, but not a ventilator. He was very clear that the virus is a hoax - no mask needed. I don't know if he's a believer now or not.
  11. R

    ECM fried

    Was your refurbed ECM reprogrammed for your truck? Is your truck modified such that it needs a custom tune?
  12. R

    Disconnect parking parking brake to replace driver's side cab mounts? Need help ASAP!

    I removed mine by myself some time ago without special tools. Didn't even know there was a special tool, so thanks for that tip. I recall it was very difficult to do, but another person helping would have made it much easier.
  13. R

    Bad Injectors?

    I wish my truck had those balance rates.
  14. R

    Trying to find o ring part numbers - coolant leak

    Get your vin# and then go to a GM Parts based website, input your VIN# instead of year, make, model, etc. This should get you only parts for your particular truck, options, etc. Is 'coolant relocation fitting' a part that usually is present on LMM's? or is this some aftermarket part?
  15. R

    p1093

    Here is some information that might help you decide a direction to your fix: https://www.duramaxforum.com/threads/2002-lb7-p1093-not-cp3-test.998185/
  16. R

    Changing radiator hoses

    To help you resolve the questions about correct parts numbers for YOUR truck, get your VIN# and go to a GM based parts site, such as GMPARTSSTORE.COM or GMPARTSDIRECT.COM and input your vin#, then start looking for your part. Once you know what GM thinks is the correct part number, you can start...
  17. R

    Roadkill drive on our summer vaca

    I use this pump as my lift pump. Been running the original for 10 years but I have a spare under the back seat, JIC. Would have been nice to have something like this along for your fiend to have. A great way to spend $32. https://www.summitracing.com/parts/atx-e8153
  18. R

    trailer wiring

    https://www.etrailer.com/Accessories-and-Parts/Titan/T4845900.html
  19. R

    Bad Injectors?

    It would be helpful to know what tests were run to determine that 2 injectors are bad. I'm assuming you know which 2 they are? Specific results on the bad and the good ones may tell you a lot. .
  20. R

    2500HD Code U0101 Service Stabiltak light / Transmission in limp mode

    Go to GMUPFITTER.COM, look in the body builder section, then look for your year/model, then look for the electrical manual for your year/model. Not every part of every circuit is there, but most are.
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