2010 GMC Sierra 3500 HD Muffler

You should remove the left wheelhouse liner, the catalytic converter to Exhaust Manifold nuts, the spark plug wires from the spark plugs, the spark plug wires from the ignition coils, the steering shaft coupling bolt, the exhaust manifold bolts, and the exhaust manifold, the exhaust manifold gasket, the catalytic converter seal, the exhaust manifold heat shield bolts, and shield from the exhaust manifold.

You should install the heat shields through the respective wheelwell, the Exhaust Heat Shield to the dash panel studs, and the exhaust heat shield nuts.

You should install a new gasket to the turbocharger with the tab facing outward, the Exhaust Pipe to turbocharger bolts, the exhaust pipe to exhaust manifold bolts, the exhaust pipe heat shield bolts, the left side exhaust heat shield, the heat shield nuts, the transmission, and the turbocharger exhaust pipe.