1998 GMC Safari Owner's Manual - Page 351

I Short TripKity Maintenance Schedule I 0 For Two-Wheel-Drive vehicles only: Clean and repack the front wheel bearings (orat each brake relining, whichever occurs first). 0 Change automatic transmission fluid and if the vehicle is mainly driven filter under one or more these conditions: of - In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) or higher. - In hiily or mountainous terrain. - When doing frequent trailer towing. - Uses such as foundin taxi, police or delivery service. If you donot useyour vehicle under any of these conditions, change thefluid and filter every 50,000 miles (83 000 km). 0 Inspect air cleaner filter if you are driving in dusty conditions. Replace filter if necessary. An Emission Control Service. (See footnotef.) 48,000 Miles (80 000 km) 0 Change engineoil and filter (or every3 months, whichever occurs first). An Emission ControlService. 0 Lubricate chassis components (or every months, whichever occursfirst). 3 (See footnote#.) ACTUAL (Continued) 7-17