Service Intervals

NOTE: If using Dexron-III, transmission fluid must be changed every 30,000 miles.

Check fluid at every engine oil change. Transmission fluid should be changed at 100,000 miles, under normal operating conditions. Under continuous extreme operating conditions (trailer towing, heavy city traffic with ambient temperatures more than 90°F (32°C) or delivery service), replace fluid and filter every 50,000 miles.