I have a 99 GMC Sierra 1500. It was broken down and being worked on for some time. Charged the battery and it started right up. Moved it to the driveway and parked it to do a maintanence check and fluid check. When moving to the driveway it began spewing raw gas out of the exhaust pipe, and shaking a bit in the front end. Put fuel injector cleaner in the tank, charged the battery, the truck turned over once and was knocking horribly in the front end. Continued to run when I hit the accelerator. As soon as I let off it died, and won't turn over at all now. Turn the key over and it will click 1 time. I can't seem to pinpoint the issue at this time. While trying to crank, the starter will jump, and the belt on the alternator tries to pull over. Nothing. Ran fine when parked, ran to the driveway with no issue other than the small shimmy and the raw gas. Wondering if this is something small I'm missing or if it's something I don't want to dig into.