Silverado 3500 4WD V8-6.0L (2007)
5. Tighten the exhaust manifold pipe to exhaust manifold nuts.
Tighten the nuts to 50 N.m (37 lb ft).
6. Connect the engine wiring harness electrical connector (4) to the left rear HO2S electrical connector (3).
7. Install the CPA retainer (8) to the left rear HO2S.
