2001 grand Prix abs/TCS/power steering/cruise

Greetings! So, it's like this... A couple of months ago my
abs light started coming on intermittently immediately
accompanied by the TCS OFF indicator. I checked the
wiring on the front speed sensors, cleaned the somewhat
infamous connector near the hub, packing it with a little
dielectric grease as was suggested somewhere and
checked the wiring for visible damage/breaks. No love
there. About a month ago my power steering became very
stiff when the light would pop on and now, finally, the
cruise sometimes disengages, always when the light is
on... The car has 179k on it at the moment, so my question
is sort of multi part here... I usually turn my own wrench in
these circumstances, so how long do these bearing go
anyway? Seems like I wouldn't be losing much to just
replace both front bearings/sensors and see where that
leaves me, no? Another random question is "can all this
possibly be tracked back to the sensors ?" I assume it all
has to be related, since nothing is ever wonkie until the abs
light comes on... Don't be too hard on me guys...and no, I
won't be visiting an ASE certified GM tech for this...love you
guys, but I love my wallet more...sorry.