Hello all, first post here, hope to do much more. Just received EFILive to custom-tune our project truck, a 2005 LLY GMC 4x4 4500 Topkick. Loaded the first tune from McRat, and noticed voltmeter was inop. Also had a P0562 system voltage low code set sometimes, but the batteries and charging system are fine. All other gauges work fine. Voltmeter works fine with stock tune. Any ideas? I'm working on some tunes for this beast, trying to work out the bugs. These medium-duty trucks are a different animal when it comes to tuning, unlike the light-duty d-maxes. The truck's running pretty good right now, made some sub 7 second 0-60 runs today with it. (Remember, it's an 11,200lb truck) This truck has all the goodies. Thanks,
Rich