i change the pump but the car wont start up
Need more info. What year and what engine?
If it is a fuel pump you are refering to,there is a relay pass side top of heater box, (underhood) that is a common failure point, it is the only relay there it will be black and if memory serves, one heavy purple wire, small green,heavy red or orange,and a grey, and black. Hope that helps.
Looking for a Used S-10 in your area?
CarGurus has 1,657 nationwide S-10 listings starting at $2,450.
Search Chevrolet S-10 Questions
Chevrolet S-10 Experts