1996 GMC Sonoma Owner's Manual - Page 305

I Short TripKity Maintenance Schedule I 0For Two-Wheel-Drive vehicles only: Clean and repack the front wheel bearings (or at each brake relining, whichever occurs first). Replace fuel filter. An Enlission Control Service.? 30,000 Miles (50000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Cor.ztrol Service. 0Lubricate the front suspension, ball joints, steering linkage and transfer case shift linkage, parking brake cable guides, propshaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 3 months, whichever occurs first). 0Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.+''k 0Replace air cleaner filter. An Emission Control Service. 0Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. DATE ACTUAL MILEAGE SERVICED BY: 7-13