2003 GMC Sierra 1500 Pickup Owner's Manual - Page 505

If the system is ever reset accidentally, you must change your oil at 3,000 miles (5 000 km) since your last oil change. Remember to reset the oil life system whenever the oil is changed. See Engine Oil on page 5-17for information on resetting the system. An Emission Control Service. 7,500 Miles (12 500 km) 0 Check readfront axle fluid level and add fluid as Lubricate chassis components with each engine oil and filter change. Vehicles used under severe commercial operating conditions require lubrication on a regular basis every 3,000 miles (5 000 km). Lubricate the front suspension, ball joints, steering linkage, transmission shift linkage and parking brake cable guides. Ball joints should not be lubricated unless their temperature is 10°F (-12°C) or higher or they could be damaged. After the services are performed, record the date, odometer reading and who performed the service on the maintenance record pages in Part E of this schedule. needed. Check constant velocity joints and axle seals for leaking. 0 Rotate tires. See Tire Inspection and Rotation on page 5-74 for proper rotation pattern and additional information. (See footnote +-) Cl Allison Transmission Only: Replace the external control-main filter. 15,000 Miles (25000 km) 0 Inspect engine air cleaner filter if you are driving in dusty conditions. Replace filter if necessary. An Emission Control Service. (See footnote f.) U Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. 0 Rotate tires. See Tire Inspection and Rotation on page 5-74 for proper rotation pattern and additional information. (See footnote +.) 22,500 Miles (37500 km) 0 Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. 0 Rotate tires. See Tire Inspection and Rotation on page 5-74 for proper rotation pattern and additional information.(See footnote +.) 6-6