OK I have searched and searched on here and found some info but nothing I have done yet seems to work. My truck was running fine yesterday and then it quit. I thought it was out of gas so put 5 gallons in to get it back running. It wont start. I am not getting the check engine light when I initially turn the key on. At first I thought it was a fuel problem but know I am thinking it is electrical somewhere. Fuel pump works if connected to 12V. I also pulled the ECM out and put it in my other truck and the check engine light came on like normal start up so its not the ECM either. I checked all the grounds and they seem good too. I also checked the fuse block and they all look good. Any thing else I can check? Its an 87 350 TBI Suburban.