1998 GMC Suburban Owner's Manual - Page 402

Part B: Owner Checks and Services Listed below are owner checks and services which should be performed at the intervals specified to help ensure the safety, dependability and emission control performance of your vehicle. Be sure any necessary repairs are completed at once. Whenever any fluids or lubricants are added to your vehicle, make sure they are the proper ones. as shown in Part D. Windshield Washer Fluid Level Check Check the windshield washer fluid level in the windshield washer tank and add the proper fluid if necessary. See "Windshield Washer Fluid" in the Jndex for further details. At Least Once a Month Tire Inflation Check Make sure tires are inflated to the correct pressures. See "Tires" in the Index for further details. Cassette Deck Service Engine Oil Level Check Check the engine oil level and add the proper oil if necessary. See "Engine Oil" in the Index for further details. Clean cassette deck. Cleaning should be done every 50 hours of tape play. See "Audio Systems" in the Index for further details. At Least Twicea Year Restraint System Check Make sure the safety belt reminder licght and all your belts, buckles, latch plates, retractors and anchora,aes 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. Engine Coolant Level Check Check the engine coolant level and add DEX-COOL@ coolant mixture if necessary. See "Engine Coolant" in the Index for further details. 7-38