Sierra 1500 4WD V8-6.0L (2007)
15. Remove the left front CPA retainer (2).
16. Remove the engine wiring harness electrical connector clip (1) from the fuel line clip.
17. Disconnect the engine wiring harness electrical connector (3) from the left front HO2S.
18. If the vehicle is a 1500 series, remove the catalytic converter to muffler nuts.
