I have an 06 LBZ with around 102,000 miles on it. I bought the truck in December completely stock. Put EFI live on it in May and after two days, it went into limp mode (P0777) while I was getting on it. Cleared it with my scan gauge and continued on my way. Later that day, I was getting on it again and it went back into limp mode with same code. Both of the issues happened on my 60hp tune. I babied it for the last two months and after changing external filter and fluid, I tried to limp it again to see if it was fixed. Limped it again, same code this past Sunday but I was on my 120 hp tune. Any input on what I need to do to fix it is appreciated. Thanks in advance
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