1997 GMC Sonoma Owner's Manual - Page 364

Part B: Owner Checksand 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 lubricants are added to your vehicle, or make sure they are the proper ones, as shown in Part D. necessary. See "Windshield Washer Fluid" in the Index for further details. At Least Oncea Month Tire Inflation Check Make sure tires are inflated to the correct pressures. See "Tires" in the Index for further details. Cassette Deck Service Clean cassette deck. Cleaning should be done every 50 hours of tape play. See "Audio Systems'' in the Index for further details. At Each Fuel Fill It is important for you or a service station uttendarzt to pe$orm these underhood checks ateuchfLtel.fil1. Engine Oil Level Check Check the engine oil level and add the properifoil necessary. See "Engine Oil" in the Index for further details. At Least Twice a Year 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 coverings, and have them repaired or replaced. (The air bag system does not need regular maintenance.) Engine Coolant Level Check Check the engine coolant level and add DEX-COOL@ coolant mix if necessary.See "Engine Coolant" in the Index for further details. Windshield Washer Fluid Level Check Check the windshield washer fluid level in the windshield washer tank and add the proper fluid if