2014 Chevrolet Express 1500 Cargo Owner Manual - Page 263

Vehicle Care 10-13 { Caution Use of the incorrect automatic transmission fluid may damage the vehicle, and the damage may not be covered by the vehicle warranty. Always use the automatic transmission fluid listed in Recommended Fluids and Lubricants on page 11-12. . Automatic Transmission Fluid (6-Speed Transmission) When to Check and Change Automatic Transmission Fluid It is usually not necessary to check the transmission fluid level. The only reason for fluid loss is a transmission leak or overheated transmission. If a small leak is suspected, use the following procedures to check the fluid level. However, if there is a large leak, it may be necessary to have the vehicle towed to a dealer and have it repaired before driving the vehicle further. Change the fluid and filter at the intervals listed in Maintenance Schedule on page 11-3, and be sure to use the transmission fluid listed in Recommended Fluids and Lubricants on page 11-12. How to Check Automatic Transmission Fluid Because this operation can be difficult, it is recommended to have this check done at your dealer, which can monitor the transmission temperature. The transmission fluid level increases with temperature. To obtain a highly accurate fluid level check, the transmission temperature must be measured. If it is decided to check the fluid level, be sure to follow all the instructions here, or a false reading on the dipstick may occur. 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. . { Caution Too much or too little fluid can damage the transmission. Too much can mean that some of the fluid could come out and fall on hot engine parts or exhaust system parts, starting a fire. Too little fluid could cause the (Continued)