Last weekend I changed the water pump in our 98 Tahoe for the second time. Not bad as we have 220M miles on it and would like to keep it a few years longer. I purchased the pump, tensioner and belt at Union Auto and then when I got into the job, I bought the lower radiator hose and idler pulley from Auto Zone........neither fit........so I went to NAPA for proper parts late in the day. About two hours wasted and trips too. Just another lesson learned.