I have a high pitch wine in engine and it increases as RPM goes up sound like right side by fire wall 85000 on car.

sounds like the hub bearings,usually a high moaning sound.

Loss of acceleration, the backpressure noise and such are kinda tell tale signs of that converter having problems, feel the exhaust out of the tailpipe it will be warm normally have someone step on the gas and if its super hot it'd be a step in the right direction.

sounds like it could be diff or gear box noise

Doesn't sound like transmission if comming from only right front side. Maybe a wheel bearing or axle , cv joint.
A little suspension work and alignment should cure it.

you could be low on transmission fluid check that and make sure it registering properly on the dipstick.

If the whine changes pitch with engine RPM it could be a serious problem with the alternator. Possibly the voltage regulator, or a shorted diode in the alternator causing high frequency AC to be fed into the harness.

yes it sounds like you may have a belt issue, may have deteriorated of the the two year span, on the other hand it may be a pulley issue two, you wont know until you change the belt

it is your idler pulley. get it from dealer comes with bracket, just use pulley off bracket. take your belt off and your idler pulley is lower right hand side(facing your engine). 15mm bolt, replace pulley and reinstall your belt. it;s a common problem on trailblazers

check for vacuum leak

Alternator?
Voltage Regulator?

If the noise sounds like a weeeeeee that increases in pitch as the RPMs increase, and you haven't heard this sound before the 'problem', suspect the alternator...