Im new to this site and appreciate and feedback. I havea 94 gmc k1500 with and 350 ihad the trans rebuilt and every so often my speedo goes crazy and reads with my tach on startup. Its happened about 4 times in 3 months but today it happenedon my way homefrom work. I got home and shut it off and noticed as soon as i did that i had no power anywhere even to my light bar which is wired to my battery (with a fusible link and relay) so i checked connections every where on the truckand stopped for a second and my power juatcame back all of a sudden so i dont know what i did that couldve helped. Please give me any opinion thank!