Sierra 3500 2WD V8-6.0L (2008)
1. Lubricate the 4 insulators where the muffler assembly hangers are inserted in order to ease installation.
2. With the aid of an assistant, position and install the muffler assembly.
3. Install the insulators (1-4) to the front, intermediate, and rear muffler assembly hangers.
4. Install the HO2S. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (1500 Series) Heated Oxygen Sensor Replacement - Bank 2
Sensor 2 (2500 Series) Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (2500 Series - Cab/Chassis) .
Notice: Refer to Fastener Notice .
5. Tighten the exhaust muffler clamp (3).
Tighten the nuts to 47 N.m (35 lb ft).
6. Install the exhaust muffler to exhaust manifold pipe nuts (1).
Tighten the nuts to 45 N.m (33 lb ft).
