1995 GMC Sonoma Owner's Manual - Page 302

I Maintenance Schedule I 42,000 Miles (70 000 km) Change engine oiland filter (or every months, whicheveroccurs 3 first). An Emission Control Service. Lubricate the frontsuspension, ball joints, steering linkage and transfer case shift linkage, parking brake cable guides, propshaft splines, universal joints, brake pedal springs, and clutch pedalsprings (or every 6 months, whichever occurs fist). 0 Check rearKront axle fluid level andadd fluid as needed. Check constant velocity joints and axle seals forleaking.** 17 Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. 45,000 Miles (75 000 km) Change engineoil and filter(or every 3 months, whicheveroccurs first). An Emission Control Service. Lubricate the front suspension, ball joints, steering linkage and transfer case shiftlinkage, parking brake cable guides, propshaft splines, universal joints, brake pedal springs, and clutch pedal springs (or every 6 months, whicheveroccurs first). Check readfrontaxle fluid level and fluid as needed. Check add constant velocity joints and axle seals for leaking.** For 2-Wheel Drive vehicles only: Cleanand repack the front wheel bearings (or at each brake relining, whicheveroccurs first). Inspect air cleaner filter if you are driving in dusty conditions. Replace filter if necessary. An Emission Control Service. 7- 14