I changed the pump on my wife's old college car (91 Cav Z24) a couple weekends ago. $50 lifetime warranty from Murrays Auto parts (free this time because it was the second time I changed it) and 3 hours of my time. I wasn't positive it was the problem (weak, but still ran) so I paid $50 for the Chevy dealer to tell me what it was. They wanted $168 for a lifetime warranty pump and $200 in labor.