3B - 12 Fuel Metering System 6.0L
MEFI 4 - PCM
8. Push the tab (1) on the lower side of the injector
connector in order to release the connector from
the injector.
9. Repeat step 9 and step 10 for each injector
connector.
10. Disconnect the fuel feed line from the fuel rail. Refer to
Quick Connect Fitting procedure in this section.
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Fuel Rail Assembly Replacement
Remove or Disconnect
1. Relieve the fuel system pressure. Refer to Fuel
Pressure Relief Procedure.
2. Remove the engine cover.
3. Before removal, clean the fuel rail assembly with a
spray type engine cleaner, GM X-30A or equivalent,
if necessary. Follow the package instructions. Do not
soak fuel rails in liquid cleaning solvent.
4. Disconnect the TP sensor harness connector.
5. Disconnect the IAC valve harness connector.
6. Identify the connectors to their corresponding injectors
to ensure correct injector fi ring order after reassembly.
7. Pull the top portion (2) of the injector connector up. Do
not pull the top portion of the connector past the top
of the white portion (1).
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