C 1500 Yukon 2WD V8-5.3L VIN Z Flex Fuel (2003)
5. Disconnect the following electrical connectors:
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Manifold absolute pressure (MAP) sensor (1)
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Knock sensor (2)
6. Remove the knock sensor harness connector from the intake manifold.
7. Remove the connector position assurance (CPA) retainer.
8. Disconnect the following electrical connectors from both sides of the engine:
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Main coil (2)
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Fuel injectors
9. Remove the harness clips from the fuel rail (1).
10. Reposition the upper engine wire harness aside.
11. Perform the following steps in order to disconnect the fuel injector electrical connectors: