1997 Chevrolet Blazer Owner's Manual - Page 336

Short TripKity Maintenance Schedule 48,000 Miles (80 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 50,000 Miles (83 000 km) IJ 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 O 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. (Continued) Lubricate chassis components (or every 3 months, whichever occurs first). (See footnote#.) 0Check readfront axle fluid level add and fluid as needed. Check constant velocity joints and axle seals for leaking. (See footnote* *.) Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) 1 DATE MILEAGE ACTUAL SERVICED BY 7-17