Chevrolet 2003 Astro Owner's Manual page 244

3. Check both sides of the dipstick, and read the lower
How to Add Fluid
level. The fluid level must be in the COLD area,
below the cross-hatched area, for a cold check or in Refer to the Maintenance Schedule to determine
the HOT area or cross-hatched area for a hot check. what kind of transmission fluid to use. See Part D:
Recommended Fluids and Lubricants on Daae 6-32.
t u
Add fluid only after checking the transmission fluid while
it is hot. (A cold check is used only as a reference.)
If the fluid level is low, add only enough of the proper
fluid to bring the level up to the HOT area for a hot
check. It doesn't take much fluid, generally less
than one pint (0.5 L). Don't ovetfi/l.
Notice: We recommend you use only fluid labeled
DEXRON@-Ill, because fluid with that label is
made especially for your automatic transmission.
Damage caused by fluid other than DEXRON@-Ill is
not covered by your new vehicle warranty.
4. If the fluid level is in the acceptable range, push the
dipstick back in all the way; then flip the handle
down to lock the dipstick in place.
After adding fluid, recheck the fluid level as
described under "How to Check."
When the correct fluid level is obtained, push the
dipstick back in all the way; then flip the handle
down to lock the dipstick in place.
5-27