1996 GMC Sonoma Owner's Manual - Page 300

I Short Trip/City Maintenance Schedule I 9,000 Miles (15 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). AI? Emission Control Service. 6,000 Miles (10 000 km) (Continued) 0Rotate tires. See "Tire Inspection and Rotation'' in the Index for proper rotation pattern and additional information. 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? I DATE I ACTUAL MILEAGE ISERVICED BYI DATE ACTUAL MILEAGE SERVICED B Y 7-8