1998 Chevrolet Express Van Owner's Manual - Page 259

How to Add Fluid Refer to the Maintenance Schedule to determine'what kind of transmissionfluid to use. See "Recommended Fluids and Lubricants" in Index. the Add fluid only after checking the transmission fluid while it is hot. (Acold 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 the HOT area to for a hot check. It doesn't take much fluid, generally less than one It (0.5 L). Don't overfill. 3. Check both sides of the dipstick, and read thelower level. The fluid level must be in the COLD area for a cold check or inthe HOT area or cross-hatched area for a hot check. 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. NOTICE: We recommend you use only fluid labeled DEXRON@-111, because fluid with that label is made especiallyfor your automatic transmission. DEXRON-111 Damage caused by fluid other than is not covered by your new vehicle warranty. After adding fluid, recheck the fluid level as described under "Howto Check." 0 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.