Ibub,
While replacing the V6 pump is not real difficult, it does take some mechanical skills. There are several steps (lower shield, drain coolant, remove battery, remove hose, scrape gasket surface, etc)that have to be done, most to make room. Even with that, the job would be a pain without the right tools. My guess is that a shop will figure on 2 hours, and probably pad it another hour to cover any snags. Parts include pump, gasket and coolant. Rates around here are $40-65/hr. Good luck.
Al
