would a faulty tps possibly keep my car from downshifting????

Yes it could. Shifting takes several variables in to consideration when it shifts, like RPM, Throttle position, speed of car, etc. However. If the TPS is a problem you should feel the RPMs change in a not smooth way.

becaouse i have dne the test with my multimeter and the 5 volt test is good so i moved on to the next and i have like 0.04 volts at idle and when i move the throttle the volts do not change at all does this sound like a bad tps

The voltage should move from low to high smoothly.

voltage dont move at all..... but it doesnt idle wierd or anything im just trying to get to the bottom of my downshifting problem its driving me nuts

Here'* the test procedure. https://www.gmforum.com/trouble-shooting-test-procedures-141/testing-tps-throttle-position-sensor-279319/

ok it moves kinda slowly it didnt jump up or anything at idle the reading is 0.96 and wot is like 5 volts so im thinking its good

Sounds like the TPS is good. How does it down shift? Is it all gears, or from 4-3 or 3-2, or 2-1. Any problems up shifting?

Looking over the manual a faulty TPS is the first thing listed on a low down shift. After that it'* shift solenoid valve problems. And that'* inside the transmission behind the side pan. I suggest having the car scanned. Some transmission codes to not trip a SES light, but will still be stored. Post those codes up here.

ok i will * soon as i get it scanned thanx dan