why does my 95 gmc yukon have no power
I replaced all censors, did full tune up, replaced coil, not the catalic converter,
replaced the o2sensor, Checked for intake leaks, And still have no power
when going up hill
Usually if problems at higher rpms, you check for a blockage of some kind, fuel--air--exhaust. With the tune-up, did you use a gage and check proper fuel pressure, you may have to check fuel pressure under load? If this vehicle is an automatic, do you drive it in od, if so, have you tried taking the hill in drive? Does the tranny downshift if vehicle is under a load?