Replace head gasket or not?

My 2000 Yukon, 75000 miles, has a coolant leak. I suspect it is the intake manifold gasket, although, I am having trouble pinpointing the leak. If I need to replace the manifold gasket, should I replace the head gasket and water pump as I precaution? Any input would be greatly appreciated. Thanks in advance.

Welcome to AF, there could be 20 opinions on this, if you can pinpoint the problem to the intake I would say no, if you will sleep better by doing it, then go for it.