Service Intervals
WARNING: This page does not describe the selected car, but rather 20 other vehicles, including the 2004 GMC Yukon XL, 2004 GMC Yukon, 2004 GMC Sierra, 2004 Chevrolet Tahoe, and 2004 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
Check transmission fluid level at each engine oil change. Change the automatic transmission fluid and the filter at 50,000 miles.