Finally got my transmission working right, mostly. Having some issues with getting the TUTD function to work correctly on my 6l80 however. The Holley software doesn?t really dive into the details of the 6l80 like HP Tuners does to allow me to fix it. I can actually connect my HP Tuners to the Holley OBDII port, and read the transmission with the VCM Editor, and see that it needs some changes made to get it to work. However, I cannot write to the transmission with HP Tuners using that port, it?s not even giving me the option, it?s greyed out. If I can read, why can?t I write? When I use the HP Tuners to read the transmission, it does say no VIN is found, is that why? Is there some sort of dummy VIN I can use or buy, since there is no VIN when using the Terminator system? Is there another reason why it won?t allow me to write?
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Originally Posted by RDF1
