How hard is it to change the power steering pump for a cadilla cts 3.6 2004?

is it hard to change the power steering pump? what about pressure hose for power steering? also.. if theres any special tools needed to do this job? THANK YOU!! i really appreciate any info, thank you so muchHow hard is it to change the power steering pump for a cadilla cts 3.6 2004?If one replaces a complete pump no special tools are required none for for pressure hose also.