1998 Chevrolet Express Van Owner's Manual - Page 350

... ,east Twice a Year Automatic Transmission Check Check the transmission fluid level; add if needed. See "Automatic Transmission" in the Index. Afluid loss may indicate a problem. Check the system and repair if needed. Restraint System Check Make sure the safety belt reminder light and all your belts, buckles, latch plates, retractors and anchorages are working properly. Look for any other loose or damaged safety belt system parts. If you see anything that might keep a safety belt system from doing its job, have it repaired. Have any torn or frayed safety belts replaced. Also look forany opened or broken air bag coverings, and have them repaired or replaced. (The air bag system does not need regular maintenance.) At Least Oncea Year Key Lock Cylinders Service Lubricate the key lockcylinders with the lubricant specified in Part D. Body Lubrication Service Lubricate all hood hinges, hood prop rod pivot, fuel filler door, rear compartment hinges, latches, locks and any moving seat hardware. Part D tells you what to use. More frequent lubrication may be required when exposed to a corrosive environment. Wiper Blade Check Inspect wiper blades for wear or cracking. Replace blade inserts that appear worn or damaged or that streak or miss areas of the windshield.Also see "Wiper Blades, Cleaning" in the Index.