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Hi, I did an LLY duramax swap into a 2005 H2 Hummer and all is working and running except I am having a strange issue. I have no RPM's and no MIL light. So I have made sure all connections at the C100 are correct and I have rung out the wires from the ECM to the IPC and all are good. I can see the RPM on the tech 2 just not on the IPC and I have swapped three different IPC's. Also I do a gauge sweep test with the tech 2 and all guages work. The MIL light won't come on even if I test the lamps using the tech 2 which is weird. Has anyone seen this issue? I feel like its a data wire but I did move the 710 data wire and also tried splicing it together with the other yellow data wire, 2470 i think can't remember the number. Any suggestions would be awesome. Also it is in limp mode as well. It does have the EGR delete and EFI Live. No codes except for the missing MIL code.



Thanks
 
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