Service Intervals
WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
Check transmission fluid level at each engine oil change. Under normal driving conditions, change transmission fluid and filter every 50,000 miles. Under severe driving conditions, change transmission fluid and filter every 15,000 miles.