2010 GMC Savana 2500 Cargo Owner's Manual - Page 288

How to Add Automatic Transmission Fluid Refer to the Maintenance Schedule to determine what kind of transmission fluid to use. See Recommended Fluids and Lubricants on page 7-11. 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 (one pint). Do not overfill. Notice: Use of the incorrect automatic transmission fluid may damage the vehicle, and the damages may not be covered by the vehicle's warranty. Always use the automatic transmission fluid listed in Recommended Fluids and Lubricants on page 7-11. • After adding fluid, recheck the fluid level as described under "How to Check Automatic Transmission Fluid," earlier in this section. A. WARM Range B. HOT Range 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 • 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. Cooling System If your vehicle has a diesel engine, see "Van Models" under "Cooling System" in the DURAMAX® Diesel Supplement. The Cooling System allows the engine to maintain the correct working temperature. 6-26