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:help I think I have an electrical problem and need a little help. We have a 05 CC/LB Silverado K3500 Dually. Driving down the road the speed o starts reading a lot faster than you are going (i.e. 90mph when actually going 30 mph according to looking out the window and looking on the Edge monitor). It also is now loosing power and downshifting, it will then only run at just above idle, sort of like when a fuel filter is plugged. And, yes I have changed the filter. I think it might be in the dash. :help