1996 GMC Sonoma Owner's Manual - Page 333

I Long Tripmighway MaintenanceSchedule I 67,500 Miles (112 500 km) 0Change engineoil and filter (or every 12 months, whichever occurs first). An Emission Control Service. 0Check readfront 0Lubricate the front suspension,ball joints, steering linkageand 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 12 months, whichever occurs first). axle fluidlevel and add fluid as needed. Check constant velocity joints and axle seals for leaking? 0Rotate tires. See "Tire Inspection and Rotation" in the Index for properrotation pattern and additional information. DATE ACTUAL MILEAGE SERVICED B Y 7-41