Engine Rattling And Whining Sounds Problems of GMC Envoy

I had just purchased my Envoy a few days prior and was on my way to get gas. The fuel was low but the fuel light was not on. When I stopped at a red light, my Envoy died. This happened at every stoplight until I put gas in it. This has happened multiple times since then. It happens anytime my vehicle is between 1/4 tank & empty. The fuel light is not on when this occurs. It almost seems as if there is not as much gas in it as the fuel gauge reads. It has only stopped one time while I was actually moving (as I was coming down a ramp to get on the interstate). It did not start back up immediately when I attempted to restart it that time, but took several tries before it started. It will literally die every time I stop until I put gas in it. There have also been a few times where I have slowed for a red light, then the light turned green so I went to accelerate and the vehicle either sputtered and felt like it was not getting gas, or died completely. Luckily, most times I can put it in neutral & get it to start right back up without having to pull over. However, I feel that his is a serious safety issue for myself & the other motorists traveling behind me as I travel very busy roads on my way to and from work. I have learned to keep the fuel above 1/4 tank but the way this thing burns gas, it does get low from time to time before I get to the gas station. I don't know if it's a fuel system issue or if the gas gauge is incorrect but this needs to be recalled because it is definitely a hazard for myself and others. Additionally, everytime I start my vehicle since it has gotten cold, it idles very high - like a loud high pitched whirring noise. It then goes very low and almost sputters. It does this several times before leveling off and sounding 'normal'. Again, I don't know if this is a gas or engine issue but I feel like it is not getting gas.

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