Avalanche 1500 2WD V8-5.3L (2008)
3. Install the HO2S's (1-5) to the catalytic converter assembly.
Notice: Refer to Fastener Notice .
Tighten the sensors to 42 N.m (31 lb ft).
4. Install the NEW exhaust seals (2 and 3) as required.
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. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (1500 Series) Heated Oxygen Sensor Replacement - Bank 2
Sensor 1 (2500 Series) .
9. If the vehicle is equipped with RPO L92, install the muffler to catalytic converter nuts.
