[Focus man. Focus.]

Hopefully somebody here will have some pointers to assist me.

My sister has a 99 Chevy Venture Van with a 3.4L V6. She was driving yesterday and everything was fine. Got home went out an hour later and it wouldn't start at all. When the key is turned it just gives one click from the starter solinoid. To which I thought it was a bad starter. I tried to give it a boost and that didn't help. I bought a replacement starter and after installing it it still has the same issue. Does anybody have any suggestions as to what this might be? She has a handicpped son that needs the van to get around and she is also a single parent that dosen't get a lot of support. Any assistance that can be provided will be greatly appreciated.

Thanks in advance. Kevin