Hello people, I'm new but looking to see if I can get some help, I have a 98 GMC 1500, with a 50 in it, I have no signal to my fuel pump, on the Gray wire side, if the truck sits for a day or so it starts right up, I've done most of the testing, new relays, fuel pump, all is good, runs great when it starts, but like I said some day's it starts and some day's it don't, if anyone has had this problem, I could use your help, thank you.