1996 GMC Jimmy Owner's Manual - Page 349

I LongTripmighwayMaintenanceSchedule I 50,000 Miles (83 000 km) Change automatic transmission fluid and filter if the vehicle is mainly driven under one ormore 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 found in taxi, police or delivery service. DATE ACTUAL MILEAGE SERVICED B Y 7-38