A mechanic I used to take my car to told me that I didn't have to change the transmission fluid in my 2005 Chevy Cavalier. I have doubts as to whether this is true or not. When it runs, it sounds a bit grainy and shifts with more effort. Is it time to change the transmission fluid in this vehicle that "doesn't require the transmission fluid to be changed?"

You have to take it to dealer to have it checked...Dealer has a special dipstick to check these type...You may could find one of these on EBay but dealer should check it for free...

follow this link on u-tube,goes on a bit but worth the wait !
cavalier fluid indicator

Changing fluid is just that

Old fluid out, new in, won't fix a thing

Yes that is correct.

I am sorry but you have a failed transmission on your hands, no other explanation fro this symptom.

these cars are notorious for bad ignition switches I have replaced hundreds..

look above the trans, should be there, sometimes a different color. If no luck check your manual or look for one online, call a dealer. My 94 stick was yellow.

Actually, the Torque Converter Clutch Solenoid is located within the transmission housing that is easily accessible through the transmission oil pan. The TCC solenoid may vary in location dependent upon manufacture but generally it is located as aforementioned. It can cause your vehicle to stall if stuck open or close because it controls loads to the engine via your torque converter which is located between the vehicle's engine and transmission. Also, make certain that you attempt to change the transmission fluid and filter before changing the TCC solenoid because that may be your underlying issue. If not, simply reuse your fresh oil and change the TCC soleniod.

Go LUBE place.They will show you.

You are probably looking at around at least 1500 if not more