2003 GMC Sonoma Owner's Manual - Page 374

Short TripKity Scheduled Maintenance The services shown in this schedule up to 100,000 miles (166 000 km) should be repeated after 100,000 miles (166 000 km) at the same intervals for the life of this vehicle. The services shown at 150,000 miles (240 000 km) should be repeated at the same interval after 150,000 miles (240 000 km) for the life of this vehicle. See Part B: Owner Checks and Services on page 6-25 and Part C: Periodic Maintenance Inspections on page 6-30. + A good time to check your brakes is during tire rotation. See Brake System Inspection on page 6-31. **Drive axle service. See Part D: Recommended fluids and Lubricants on page 6-32 for proper lubricant to use: Check fluid level and add fluid as needed. If driving in dusty areas or when towing a trailer, drain fluid and refill every 15,000 miles (25 000 km). If your vehicle has a locking differential, drain fluid and refill at first engine oil change. More frequent lubrication may be required for heavy-duty or off-road use. Footnotes The U.S. Environmental Protection Agency or the California Air Resources Board has determined that the failure to perform this maintenance item not nullify will 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. 3,000Miles (5000 km) 0 Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 0 Lubricate chassis components (or every 3 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 **.) t 6-7