You can coat the threads with anti-seize compound GM P/N 12377953, or equivalent., install the HO2S to the exhaust manifold, one exhaust manifold bolt to the exhaust manifold, the new exhaust manifold gasket onto the exhaust manifold and bolt, the exhaust manifold (with gasket) to the cylinder head and the catalytic converter, the remaining exhaust manifold bolts, the catalytic converter, the oil level indicator, and the exhaust manifold heat shield.
By BobGM Specialist
01/11/2022