1998 Chevrolet Lumina Owner's Manual - Page 257

Automatic Transaxle Fluid When to Check and Change Operating the engine with air cleaner off can the cause you or others to beburned. Theair cleaner not only cleans the air, stops flameif the engine it backfires. If it isn't there, and the engine backfires, you could be burned. Don't drive with it off, and be careful working on the engine with the air cleaner off. A good time tocheck your automatic transaxle fluid level is when the engineoil is changed. Change both the fluid andfilter every 50,000 miles (83 000 k ) the vehicle is mainly driven under m if one or moreof these conditions: In heavy city traffic where the outside temperature regularly reaches 90°F (32"C) or higher. In hilly or mountainous terrain. When doing frequent trailer towing. 0 I NOTICE: If the air cleaner isoff, a backfire can cause a damaging engine fire. And, can easily get dirt into your engine, which damage it. Always will have theair cleaner in place when you're driving. Uses such as foundin taxi, police or delivery service. If you do not use your vehicle under any these of conditions, thefluid and filter do not require changing. See "Scheduled Maintenance Services" in the Index. 6-19