Rough starts only after sitting over night. Fuel pressure gauge reads zero after sitting overnight. Replaced fuel pump, no improvements, replaced all 8 injectors, no improvements. Fuel seems to be bleeding out somewhere

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! If your Silverado’s fuel pressure reads zero after sitting, despite a new pump and injectors, there could be a leak or a faulty check valve in the fuel line. The check valve, often built into the fuel pump assembly, keeps pressure in the lines when the engine's off. Since you've replaced the pump, it might be worth checking for leaks in the fuel lines, pressure regulator, or at the fuel rail. If fuel drains back into the tank or evaporates due to a tiny leak, it’ll cause these rough starts. If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554.