Sierra 1500 4WD V8-6.0L (2007)
Tighten the sensors to 42 N.m (31 lb ft).
4. Install the NEW exhaust seals (2 and 3) as required. (1500 series shown, 2500/3500 series similar).
5. Install the catalytic converter assembly to the muffler.
6. Install the catalytic converter assembly to the exhaust manifolds.
7. Install the catalytic converter to exhaust manifold nuts (1).
Tighten the nuts to 50 N.m (37 lb ft).
8. Install the HO2S.
9. If the vehicle is a 2500/3500 series, install the muffler to catalytic converter nuts.
Tighten the nuts to 45 N.m (33 lb ft).
