GMC 2003 Savana Van Owner's Manual page 266

Check both sides of the dipstick, and read the lower
level. The fluid level must be in the COLD area for
a cold check or in the HOT area or cross-hatched
area for a hot check.
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.
How to Add Fluid
Refer to the Maintenance Schedule to determine what
kind of transmission fluid to use. See Part D:
Recommended Fluids and Lubricants
on
page 6-1 7.
Using a funnel, add fluid down the transmission dipstick
tube 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 overf;l/.
Notice: We recommend you use only fluid labeled
DEXRON@ -111, because fluid with that label is
made especially for your automatic transmission.
Damage caused by fluid other than DEXRON@ -111 is
not covered by your new vehicle warranty.
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.
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