CTS V6-2.8L (2006)
2. Install a NEW exhaust manifold gasket to the exhaust manifold.
3. Install the exhaust manifold with the gasket to the catalytic converter and the cylinder head.
4. Install the exhaust manifold bolts.
Tighten the exhaust manifold bolts to 20 Nm (15 ft. lbs.).
Notice: Refer to Fastener Notice in Service Precautions.
5. Install the catalytic converter nuts.
6. Install the exhaust manifold heat shield.