i have a 2000 rodeo 2.2 manuel and the check engine light, abs and the gas gauge does not work...what computer do i need and where is it located?

 

R u sure its a computer? I just found a bad connection on mine that fixed the gas gauge and when I was tracking down the wiring I found that there is a wire that feeds the CEL. I don't know about the abs thing though. The wire I found was at the air box to fender on the drivers side. In my case it was the white connector, although I think there are 4 of them there. Have you checked for voltage out of the computer for the fuel gauge?