1. Safety First: Disconnect the negative (-) battery cable to prevent accidental sparking. Wait a few minutes to allow any residual charge to dissipate.
2. Locate the Fuel Pump Relay: The location varies slightly depending on your specific Impala's trim level, but it's typically found in the underhood fuse box (sometimes called the power distribution center or PDC). Consult your owner's manual for the exact location and the relay's appearance (it might be labeled "FUEL PUMP" or have a fuel pump symbol). Often, it's a small, square or rectangular component.
3. Remove the Fuel Pump Relay: Use a small flat-head screwdriver or a relay puller tool to carefully remove the relay from its socket.
4. Start the Engine: Crank the engine. The engine will crank but won't start because the fuel pump is not receiving power. Keep cranking for about 10-15 seconds to fully deplete the fuel pressure in the lines.
5. Reconnect the Fuel Pump Relay: Once you've cranked the engine for the recommended time, reinstall the fuel pump relay.
6. Reconnect the Battery Cable: Reconnect the negative battery cable.
7. Test: Attempt to start your vehicle.
Important Considerations:
* Owner's Manual: Your owner's manual is the best resource for the exact location of the fuel pump relay in your specific vehicle.
* Safety: Always disconnect the negative battery cable before working on any electrical components in your vehicle.
* Alternative Method (Less Recommended): Some mechanics might suggest disconnecting the fuel line at the fuel rail. This is generally not recommended for the average DIYer as it can be messy, requiring special tools and potentially leading to fuel leaks and injury.
If you are uncomfortable performing this procedure, it's best to take your vehicle to a qualified mechanic. They have the tools and expertise to safely release the fuel pressure and address any underlying issues.
