1995 GMC Suburban Owner's Manual - Page 398

Maintenance Schedule II - Gasoline Engines With Light Duty Emissions I 30,000 Miles (50 000 km) 0 Change engine oil and filter (or every I2 months, whichever occurs first). An Emission Control Service. 0 Lubricate the front suspension, king pin bushings, steering linkage, transmission shift linkage, transfer case shift linkage, parking brake cable guides, rear driveline center splines, front axle propshaft splines, brake pedal springs and clutch pedal springs. Ball joints and king pin bushings should not be lubricated unless their temperature is IO" F (-12" C), orhigher. When weather is cold, let the ball joints and king pin bushings warm up before lubrication or they could be damaged. Perform each of the listed lubrication service items at this mileage interval (or every 12 months, whichever occurs first). 0 Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.** 0 For 2-Wheel Drive vehicles only: Clean and repack the front wheel bearings (or at each brake relining, whichever occurs first). 0 Drain, flush and refill cooling system (or every 24 months, whichever occurs first). See"Engine Coolant" in the Index for what to use. Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test the cooling system and pressure cap. An Emission Confro/ Service. 0 Replace spark plugs. An Enzission Control Service. Replace air cleaner filter. Arz Emission Control Service. DATE ACTUAL MILEAGE SERVICED BY: 7-30