2003 GMC Sonoma Owner's Manual - Page 385

Footnotes The U S . Environmental Protection Agency or the California Air Resources Board has determined that the failure to perform this maintenanceitem will not nullify the emission warranty or limit recall liability prior to the completion of the vehicle 's useful life. We, however, urge that all recommended maintenance services be performed at the indicated intervals and the maintenance be recorded. # Lubricate the front suspension, ball joints, steering linkage, parking brake cable guides, propshaft splines, universal joints, constant velocity joint and brake pedal springs. 7,500 Miles (12 500 km) 0 Change engine oil and filter (or every 12 months, whichever occurs first). An Emission Control Service. 0 Lubricate chassis components (or every 12 months, whichever occurs first). (See footnote #.) 0 Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. (See footnote **.) 0 Rotate tires. See Tire Inspection and Rotation on page 5-66 for proper rotation pattern and additional information. (See footnote +.) t + A good time to check yourbrakes is during tire rotation. See Brake System Inspection on page 6-31. ** Drive axle service. See Part D: Recommended Fluids and Lubricants on page6-32 for proper lubricant to use: 0 Check fluid level and add fluid as needed. 0 If your vehicle has a locking differential, drain fluid and refill at first engine oil change. 15,000 Miles (25 000 km) Ll Change engine oil and filter (or every 12 months, whichever occurs first). An Emission Control Service. 0 Lubricate chassis components (or every 12 months, whichever occurs first). (See footnote #.) 0 Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. (See footnote **.) 6-18