2024 Sierra Denali Oil Change. Modern engines and advanced synthetic oils have extended the intervals between changes. We get a free gmc oil change but we will probably not turn 4k a year on this vehicle so looks like next oil and filter will be on gmc at around 3k.

You might get the first couple of oil changes free. 6.6l duramax oil change guide, including motor oil requirements (viscosity charts and api categories), engine oil recommendations, oil change procedures, service intervals, and a list of.