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  1. R

    Please help me!! My son's LB7 is stumbling at 80 km/hr under light load No Trouble codes

    The wiring from the TCM attaches at the passenger-side rear of the transmission. Look at that connection and see if there is trans fluid present. If so, use some brake cleaner to remove the oil from both sides of the connector.
  2. R

    Bridgeport mill purchase.

    What a deal!!
  3. R

    2017-2019 L5P 220A Alternator / Dual Alternators Part Numbers

    And nicely laid out.
  4. R

    LBZ DTC Issue

    These service advisories are written by others, and they're not perfect. I'm sorry if you don't like the information I provide. Just don't pay any attention if it is no use to you.
  5. R

    Please help me!! My son's LB7 is stumbling at 80 km/hr under light load No Trouble codes

    Check the ground from the firewall to the back of the driver side head. That often gets rotted out, particularly in snow country. You can get more help, electrical circuits etc here: Charm Manuals for Chevrolet vehicles | Operation CHARM
  6. R

    LBZ DTC Issue

    With the engine off, key on, sensors unplugged, you are very likely to get a code. The ECM gets power and turns on any time the key is on, and does the circuit checks, thus a code.
  7. R

    Did I just destroy my LBZ? (aka What the h*** was I thinking)

    C0035 info attached
  8. R

    Transmission issue or wiring??

    I intended to attach this one https://s7609befdab33e790.jimcontent.com/download/version/1631817249/module/7046708813/name/Allison 1000-2000 Series Service Manual.pdf Website says tooooo large to post the file directly
  9. R

    LBZ DTC Issue

    Some information is attached. I hope you are using an OEM sensor??
  10. R

    Transmission issue or wiring??

    Maybe some additional info here https://www.sellmanuals.com/wp-content/pdf/Allison%201K%202K%20Service%20Manual.pdf
  11. R

    LLY ECM Help.

    Just to confirm, the ECM itself was internally shorted, correct? And you will replace the ECM?
  12. R

    '01 3500 LB7 P0202 P0203 P0205 P0208 P1262 LB7 Issue after head gasket replacement

    Under the driver's feed, outside the frame , ground zone 18. I know you have a 2001 not 2003, but I couldn't find a similar document for 2001
  13. R

    '01 3500 LB7 P0202 P0203 P0205 P0208 P1262 LB7 Issue after head gasket replacement

    Maybe something here will help.
  14. R

    Intermittent P003A and P2599 on 2016 GMC LML Duramax

    Take a look at the attachments, which are specifically for my 2008 LMM. In particular, look at the Diagnostic Fault Information chart from P003a and the information in the P2599 document. See what they have in common. That's where I would start, before changing any parts.
  15. R

    '01 3500 LB7 P0202 P0203 P0205 P0208 P1262 LB7 Issue after head gasket replacement

    Group 1-DTC P2146 with injectors 1 and 4 Group 2-DTC P2149 with injectors 6 and 7 Group 3-DTC P2152 with injectors 2 and 5 Group 4-DTC P2155 with injectors 3 and 8 When a fuel injector circuit condition is detected by the ECM, the affected fuel injectors will be disabled and may disable the...
  16. R

    LLY P0335

    Use a jumper wire to start with, de-pin if you have good results.
  17. R

    Transmission issue or wiring??

    Other cars, such as my Mercedes, have similar problems, except that their issue is engine oil penetrating the wiring connections to the ECM. So it's not just trans fluid that has this property.
  18. R

    LLY P0335

    I stand corrected. Thanks for that.
  19. R

    LLY P0335

    The crank sensor power is a 5V signal from the ECM, not 12V. Don't put 12V on a sensor wire unless it really requires 12v.
  20. R

    Coolant issue

    So the leak is at the passenger side bottom, at the radiator hose? Isn't there supposed to be an orange o-ring in there? Very common for that to get lost. I've had that problem before on my LMM.
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