Service Intervals
WARNING: This page is about a different car, the 1984 Isuzu Trooper II, 1984 Isuzu Pickup, 1984 Isuzu Impulse, and 1984 Isuzu I-Mark. However, it is still accessible from the selected car via links, so may be relevant.
Check fluid every 7500 miles or 12 months. Replace fluid after first 7500 miles and every 30,000 miles thereafter.