1997 GMC Safari Owner's Manual - Page 359

45,000 Miles (75000 km) 0Change engine oil and filter (or every 12 months, whichever occurs first). An Emission Control Service. - In hilly or mountainous terrain. - When doing frequent trailer towing. - Uses such as found in taxi, police or 0Lubricate chassis components (or every 12 months, whichever occurs first). (See footnote #.) 0Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. (See footnote **.) 0Change 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 90O F (32°C)or higher. delivery service. Ifyou do not useyour vehicle under any o these f conditions, change the fluid and filter every 30,000 miles (50 000 km). 0Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) DATE MILEAGE ACTUAL SERVICED BY: