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To replace the fuel lines in a 2001 GMC Jimmy, start by relieving fuel system pressure by removing the fuel pump relay and running the engine until it stalls. Next, safely raise the vehicle and access the fuel lines, disconnecting them from the fuel tank and engine using appropriate tools. Replace the old lines with new ones, ensuring all connections are secure and using new O-rings or gaskets as needed. Finally, reconnect the fuel pump relay, check for leaks, and start the engine to ensure proper operation.

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1w ago

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