1996 GMC Sonoma Owner's Manual - Page 335

I Long Tripmighway Maintenance Schedule I 90,000 Miles (150 000 km) 0Check readfront 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 proper rotation pattern and additional information. 0Change engine oil and filter (or every 12 months, whichever occurs first). An E1nis.siolz Control 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 12 months, whichever occurs first). 0Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.*'$ (Continued) , i ACTUAL MILEAGE SERVICED B Y 7-43