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Re: '02 YukonXL + low fuel + overnight = no start
There is nothing factory that makes it not start when below 1/4 tank.
I would check the fuel pressure when its below a 1/4 and wont start. Could be that the pressure is too weak when the gas is that low wich could be the fuel pump.
Test the fuel pressure and see what it does...its the only way I can think of to start pointing fingers at parts.
Let us know what you get.
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