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Not necessarily; the fuel sending unit is just the pump and signal; are you getting fuel to the engine??? you can smell it above the engine if not listen for the fuel pump when you turn the ignition (key) it should fire;pump;actuate, if not then you need a new pump/sending unit. Is the engine turning over? Is it trying to start? Do the lights and wipers work? i.e. if you are getting power, and fuel, then it could be the cap and rotor and maybe the spark plugs that need to be changed.

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Q: Will fuel sending unit cause Chevy to not start?
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