How do replace the cam and lifter on a Pontiac Sunfire 2.2?

To replace the cam and lifter on a Pontiac Sunfire 2.2, start by disconnecting the battery and removing the intake and exhaust manifolds to access the engine's top end. Next, remove the timing chain cover and the timing chain to expose the camshaft. Carefully unbolt the old camshaft and lifters, then install the new cam and lifters, ensuring proper alignment and lubrication. Reassemble all components in the reverse order, making sure to torque bolts to manufacturer specifications.