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    EFILive 07 C5500 LLY problem

    thought I would update, tried unplugging fuel temp sensor and removing associated circuit dtc's to see if that would keep the REP light out, it did, unfortunately that limits rail pressure to 17.5 regardless of how you have B1057 setup. Any ideas, seems to be that these parameters are unable to...
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    EFILive 07 C5500 LLY problem

    it is a medium duty, it's basically a LBZ, same computer ect, just like an 06 pickup LLY, cept this has a completely different os, cuz like the light I got coming on is a medium duty only thing, and unfortunately it doesn't seem to work putting in a light duty LBZ/LLY tune, lol, ie it doesn't...
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    EFILive 07 C5500 LLY problem

    Hello, I am currently working on a 07 lly c5500 that has an issue i can't seem to work out. Truck came in with p0087 code and obvious rail pressure concerns. Diagnosis of low pressure yeilded a new injection pump, and one injector that had a high return rate. After replacement of those parts...
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