Hello everyone. I'm a newbie so go easy on my green mind. I have an 07 Yukon XL 1500 body and chassis that I put an LML Duramax in. At the moment my ABS/Trac light is on. Has a U0100 stored in EBCM, says can't communicate with ECM. All communication circuits are good. Went to program EBCM to a 2500 under 8600 GVWR since module pins are the same but it won't program using SPS. I'm sure its a software issue between the 1500 EBCM and 2500 ECM. Any direction on what I could do to correct it?

21 hours ago, Brettydean said:

Hello everyone. I'm a newbie so go easy on my green mind. I have an 07 Yukon XL 1500 body and chassis that I put an LML Duramax in. At the moment my ABS/Trac light is on. Has a U0100 stored in EBCM, says can't communicate with ECM. All communication circuits are good. Went to program EBCM to a 2500 under 8600 GVWR since module pins are the same but it won't program using SPS. I'm sure its a software issue between the 1500 EBCM and 2500 ECM. Any direction on what I could do to correct it?

VIN of LML and VIN of Yukon?

They would be different. Do you think changing the VIN in the EBCM to match ECM would make the difference. I could change  VIN on ECM with EFI Live. Didn't know what exactly would stop the two from not communicating.