2001 Pontiac Grand Prix GTP supercharged
Car is having a rough time shifting.
Was told the throttle position sensor. I
replaced that and it was good for a
day shifting normally and now it’s
back to not shifting right again. You
have to let off the gas for it to shift
into every gear. I replaced the throttle
position sensor and replaced the
transmission filter. Don’t know where
to go from here.