We have a 2004 Chevy Silverado with 183K miles on it (mostly highway miles) and last week the truck started to spitter and sputter when at a stoplight, we have to keep the truck on Neutral and the foot on the gas so it won't die. We replaced fuel filter, coil pack, wires, plugs, cap and rotor. The truck rans fine during the daytime, but when its about 5pm or so, it just dies, won't even spitter or sputter, just dies when we slow down or come to a stop. Can someone please help?!! we don't know what else to do.