I have seen people ask... and i have seen different answers.

Does any one have a wiring diagram for the fuel system? Does anyone know where the fuel pump relay is? Anyother possible clues.

1997 Chevy Blazer 4wd 4 door 4.3 liter engine

 

I have a 97 Olds Bravada and the relay for the fuel pump is in the glove box. There are three in there but I don't remember which is which.

My relay got weak with age and after driving a short time the car would misfire. This was because the voltage was low at the fuel pump and this caused low fuel pressure. The low fuel pressure caused miss fires.

This continued until the cat was damaged by the unburned fuel passing through.

 

fuel relay is in the glovebox behind a panel in the upper left corner