1993 Buick LeSabre Owner's Manual - Page 243

Refer to the Maintenance Schedule to determine when to replacethe air filter. See "Scheduled Maintenance Services" the Index. in Automatic Transaxle Fluid When to Check and Change: A good time to check your automatic transaxle fluid A CAUTION: Operating the engine with the air cleaner off can cause you or others to be burned. The air cleaner not only cleans the air, it stops flame if the engine backfires. If it isn't there, and theengine backfires, you couldbe burned. Don't drive with it off, and be careful workingon the engine with the air cleaner off. level is when the engine oil is changed. Refer to the Maintenance Schedule to determine when to change your fluid. See "Scheduled Maintenance Services" in the Index. I How to Check: Because this operation canbe a little difficult,you may choose to have this done at a Buick dealership Service Department. If you do it yourself, be sure to follow the all instructions here,or you could geta false readingon the dipstick. NOTICE: If the air cleaner is off, a backfire cancause a damaging engine fire. And, dirt can easily gel into your engine, which wiildamage it. Always have the aircleaner in place when you're driving. 241