▲ 2 r/MechanicAdvice+1 crossposts

Anyone know what this connector is for?

2000 Chevy Trailblazer 4.3L 4x4. Runs rough and have to keep pressing the gas for it to not die. OBD not working right now. Any help would be greatly appreciated.

u/Extreme_Focus2161 — 8 days ago