2011 Chevrolet Express 1500 Cargo Owner's Manual - Page 287

Vehicle Care 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. Using a funnel, add fluid down the transmission dipstick tube only after checking the transmission fluid while it is warm or 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 middle of the WARM (A) or HOT (B) range depending on the ambient temperature and prior driving conditions. Refer to "How to Check Automatic Transmission Fluid", earlier in this section for instructions on driving to achieve warm or hot transmission fluid. It does not take much fluid, generally less than 0.5 L (1 pt). Do not overfill. 10-17 How to Add Automatic Transmission Fluid Refer to Recommended Fluids and Lubricants on page 11‑8 to determine what kind of transmission fluid to use. Notice: Use of the incorrect automatic transmission fluid may damage the vehicle, and the damages may not be covered by the vehicle warranty. Always use the automatic transmission fluid listed in Recommended Fluids and Lubricants on page 11‑8. . After adding fluid, recheck the fluid level as described under "How to Check Automatic Transmission Fluid," earlier in this section. 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. . A. WARM Range B. HOT Range