If it is an automatic, read the dipstick. It is written on the dipstick. If it is a standard tranmission, mercon works.
You remove the transmission dip stick. You will need a small funnel that will fit in the tube where the stick goes in at to check fluid level in transmission. Put fluid in there.
Dextron
i would have it serviced with a manual trans. it isn't as easy as just adding fluid
As with nearly all automatic transmission the fluid goes in through the dipstick tube.
checking transmission fluid 3.1 ltr
How many quart of transmission fluid is requier for a Chevy impala 2007
DEXRON 3
A 2004 Chevy Malibu uses standard Dexron III transmission fluid. This is a widely available fluid used by many GM vehicles.
Check the transmission dipstick, it is written on the stick what fluid to use.
"Honda Genuine" transmission fluid is the correct fluid type. Specifically use this type or it will cause damage.
A 2001 Pontiac Sunfire requires 1.8 quarts of DEXRON III fluid for the 5-speed manual transmission.
Dextron-II jr