How do you change the intake gasket on intake on 2004 Cadillac CTS?

To change the intake gasket on a 2004 Cadillac CTS, first disconnect the battery and remove any components obstructing access to the intake manifold, such as the air intake duct and throttle body. Then, unbolt the intake manifold and carefully lift it off, ensuring to keep track of any bolts and connectors. Replace the old gasket with a new one, reassemble the manifold, and reconnect all components in reverse order. Finally, reconnect the battery and check for leaks after starting the engine.