Sierra 2500 Denali 2WD V8-6.0L (2011)
Caution: Refer to Fastener Caution (See: Service Precautions/Vehicle Damage Warnings/Fastener Caution).
2. Install a NEW seal (2) to the left manifold exhaust pipe. Tighten the nuts (1) to 50 Nm (37 lb ft).
3. Inspect the seal (2) and replace if worn or damaged.
4. Install the right catalytic converter to the exhaust manifold with nuts (1) and tighten to 50 Nm (37 lb ft).