1997 GMC Safari Owner's Manual - Page 334

I Short Trip/City Maintenance Schedule I 15,000 Miles (25000 km) I7 Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 0Change automatic transmissionfluid 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 O F 90 (32 O C) or higher. - In hilly or mountainous terrain. - When doing frequent trailer towing. - Uses such as found in taxi, police or delivery service. lfyou do not use your vehicle under any of these conditions, change the fluid and filter every 30,000 miles (50 000 km). 0Lubricate chassis components (or every 3 months, whichever occurs first). (See footnote #.) 0Inspect air cleaner filter if you are driving in dusty conditions. Replace filter if necessary. An Emission Control Service. (See footnote?.) 0Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. (See footnote **.) 0For Two-Wheel-Drive vehicles only: Clean and repack thefront wheel bearings (orat each brake relining, whichever occurs first).