1998 GMC Sonoma Owner's Manual - Page 355

L n g Tripmighway Maintenance Schedule =- 1 I DATE I SERVICED BY: ACTUAL MILEAGE 37,500 Miles (62 SOU km) 0 Change engine oil and filter (or every 12 months, whichever occurs first). An Emission Control Service. 0 Lubricate chassis components (or every 12 months, whichever occurs first). (See footnote#. j 0 Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. (See footnote 'k'f'.j 0 Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote j +. 45,000 Miles (75 000 km) Change engine oil and filter (or every 12 months, whichever occurs first). An Emission Control Service. 0 Lubricate chassis components (or every 12 months, whichever occurs first). (See footnote#.) Check readfront axle fluid level and add fluid as needed. Check constant x:4:.) velocity joints and axle seals for leaking. (See footnote 0 Change 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 90°F (32°C) orhigher. - In hilly or mountainous terrain. (Continued) (7 DATE I 7-33