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The Evaporative Emission Control System(EVAP) is used to prevent gasoline vapors from escaping into the atmosphere from the fuel tank and fuel system.

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Q: What is the purpose of a fuel vapor return hose?
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How can you replace the fuel pump on a Tahoe 2003?

The fuel pump is in the fuel tank. First, remove th fuel tank from the truck being careful to disconnect the big fill hose, fuel hose, return hose, and vapor hose as well as the electrical connector. Then, remove the locking ring holding the pump in the tank. Pull the pump up out of the tank noting orientation. Reverse procedure to install new pump being careful not to bend the fuel level sender (for gage) or the pickup screen.


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