hi guys, here's my problem, 01 astro, 96 k original fuel pump. i think it s*** itself. turn key on, don't hear nothing. no fuel pressure at all on the rail. i figure it's the fuel pump.how hard is it to change? my van has the california emmisions on it. do i need any special tools to do this job? i've looked on a few web sites and they show 2 different types of fuel pumps for this van. any and all help is appreciated. thanks in advance.