hello everyone, I have an 88 gmc 1500 2wd with a 305 v8 and an auto trans. I think the electronic fuel pump circuit is possesed by the devil. My truck has been running fine until recently. Now it runs when it wants to. The fuel pump is less than a year old (napa brand), and the relay was the first thing I changed when all this started and the fuse is okay. Sometimes I have power going to the fuel pump, and sometimes not. Does anyone here know if there is some sort of collision safety cut-off switch, like on a ford? Is the computer somehow involved? If you can get it to start, it runs perfectly. Any help is greatly appreciated.