EDIT:
While the answer provided by someone else (above) is correct on most makes and models, it is incorrect in regards to the the sunfire of production years 2000 and up. There is no dipstick on a 2000 sunfire as I have owned two and know from first hand experience (2.2 and 2.4 although not GT) GM decided that since the fluid never really needs replacing for the life of the vehicle that they could scrap the dipstick all together. Fortunately there is a very accessable red cap on the top of the transmission (driver side) which is labeled. Either take your car in to the mechanic, or top it up yourself. Just be carefull not to add too much fluid or the pressure could cause a leak and possibly a fire should it spill onto the exhaust or engine from what ive been told (informed by a mechanic).
Remove the transmission oil pan
as far as i know you cant check the transmission fluid on a 2000 Pontiac sunfire. It uses dexcool automatic transmission fluid and very rarley needs to be changed, i have a manual shift and it never has to be changed. Actually the only way that you can change it is by having it flushed the same way you flush a radiator, it has to be sucked out by a machine.
You'll have to pull the transmission pan, and drain the fluid. This is a messy job. I recommend having it done at the shop if you can.
no.... Pontiac changed to a new transmission in 2000
Dexron VI ATF or Dexron/Mercon Domestic Multi-Vehicle ATF.
The amount of transmission fluid that is needed by a 2000 Sunfire 2.2 automatic varies, depending on what you need your car for. Generally, it will only take 3 ounces.
your vehicle does not have a dipstick tube,your trans is a sealed unit and cannot have fluid added to it.the only way to check your fluid level is at the transmission itself.there is a plug on the passenger side top area of your trans case
Dexron III automatic Transmission fluid should be used in a 2000 Pontiac Grand AM. This can be picked up at almost any general store.
where is the location posslook sensor three wires , 2000 pontiac sunfire
There is a cap that says transmission fluid only on it. It should have yellow or red writing.
On the top of the transmission there is a red cap. that cap comes off and you add fluid through there.
Unfortunately there isn't one.