Impala V6-3.9L (2007)
16. Disconnect the intake manifold tuning valve electrical connector.
17. Remove the air cleaner outlet duct.
18. Disconnect the left side spark plug wires from the spark plugs.
19. Disconnect the left side spark plug wires from the ignition coil.
20. Disengage the spark plug wire retainer clips from the intake manifold bracket and the heater inlet/outlet hose/pipe bracket.
21. Remove the left side spark plug wires.
