In the transmission.
You pour it in a funnel connected to the check fluid tube. You will need to get a transmission fluid funnel.
Thru the transmission dipstick tube.
Through the dipstick tube
you apparently have a manual transmission or you would have found the dipstick/filler tube commonly yellow in this year range as is our 95 corsica! manual trannies don't usually require fluid until full servicing. but in the case you do need it, should be steel plug about 1/2 way up the side of tranny usually passenger side.
It is important to maintain the fluid levels in a car, and it is important to put the right type of fluids in the car as well. A 1989 Chevy Pick up uses Dexron III transmission fluid.
as long as it is an automatic transmission, you put ATF in
Thru the dipstick tube.
Through the dipstick tube
Dexron II or any other transmission fluid for GM vehicles.
In the tube that holds trans dipstick.
Automatic, the fluid can be added through the transmission dipstick tube. Standard, fluid has to be pumped in through a fill plug on the side of the trans.
Because its a Chevy corsica not a ford corsica!!!!!