1995 GMC Yukon Owner's Manual - Page 387

Maintenance Schedule I - Gasoline Engines With Light Duty Emissions 30,000 Miles (50 000 km) 0 Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Serllice. 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 10" 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 6 months, whichever occurs first). 17 Check readfront axle fluid level and add fluid a s needed. Check constant velocity joints and axle seals for leaking.'i'''' 0 Drain, flush and refill cooling system (or every 24 months, whichever in occurs first). See "Engine Coolant" the Index for what t o use. Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test the cooling system and pressure cap. An Emission Control Service. 0 For 2-Wheel Drive vehicles only: Clean and repack the front wheel bearings (or at each brake relining, whichever occurs first). 0 Replace spark plugs. An Emission Control Se/-viw. 0 Replace air cleaner filter. Replace filter more often under dusty conditions. An Emission Control Service. 0 Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. DATE ACTUAL MILEAGE SERVICED BY: 7-19