1995 GMC Sonoma Owner's Manual - Page 303

Maintenance ScheduleI 48,000 Miles (80 000 km) 0 Change engine oil and filter (or every3 months, whichever occurs first). An Emission Control Service. 0 Lubricate the front suspension, ball joints, steering linkage and transfer case shift linkage, parking brake cable guides,propshaft splines, universal joints, brake pedal springs, and clutchpedal springs (or every 6 months, whichever occurs first). Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.** I DATE I ACTUALMILEAGE I SERVICED B Y I 50,000 Miles ( 3 000 km) 8 0 Change automatic transmission fluid and filter if the vehicle is mainly driven under one or more of these conditions: - In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) or higher. In hilly or mountainous terrain. When doing frequent trailer towing. Uses such as foundin taxi, police or delivery service. the fluid - lf you do not use your vehicle under any of these conditions, and,filter do not require changing. Manual transmission fluid doesn't require change. I DATE I ACTUALMILEAGE I SERVICED BY: I 7- 15