1996 GMC Suburban Owner's Manual - Page 371

At Least Twice aYear 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 for any opened or broken air bag covers, and have them repaired or replaced. (The air bag system does not need regular maintenance.) At Least Once a Year Key Lock Cylinders Service Lubricate the key lock cylinders with the lubricant specified in Part D. Body Lubrication Service Lubricate all fuel door, body hood and body door hinges, rear compartment hinges, tailgate handle pivot points, latches, locks and folding seathardware. Part D tells you what to use. More frequent lubrication may be required when exposed to a corrosive environment. Air Cleaner Filter Restriction Indicator Check Ccv-ter Switch Check Your vehicle has an indicator on the engine that lets you know when the air cleaner filteris dirty and needs to be changed. Check indicator at least twice a year or when your oil is changed. See "Air Cleaner" the Index for in more information. Automatic Transmission Check Check the transmission fluid level; add if needed. See "Automatic Transmission" in the Index. A fluid loss may indicate a problem. Check the system and repair if needed. When you are doing this check, the vehicle could move suddenly.If it does, you or others could be injured. Follow the steps below. 7-43