1998 Chevrolet Venture Owner's Manual - Page 353

Automatic Transaxle Fluid When to Check and Change A good timeto check your automatic transaxle fluid level is when the engine oil is changed. Change both the fluid and filter every 50,000 miles (83 000 k m ) if the vehicle is mainly driven under one or more of these conditions: In heavy city traffic where the outside temperature regularly reaches90°F (32 O C) or higher. In hilly or mountainous terrain. When doing frequent trailer towing. Uses such as found in taxi, police or delivery service. If you do not use your vehicle under any of these conditions, the fluid and filter do not require changing. See "Scheduled Maintenance Services'' in the Index. How to Check Because this operation can be a little difficult, you may choose to have this done your at Chevrolet dealership Service Department. If you do it yourself, be sure to follow all the instructions here,or you could get a false reading on the dipstick. NOTICE: Too much or too little fluid can damage your transaxle. 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. Be to sure get an accurate readingyou if check your transaxle fluid. 6-18