How long does it take to change a oil pump on a 2004 suburban 5.3?

Changing the oil pump on a 2004 Chevrolet Suburban with a 5.3L engine typically takes between 4 to 8 hours, depending on the experience of the mechanic and the specific conditions of the vehicle. The process involves removing the oil pan, which can be time-consuming due to the need to disconnect various components. Additionally, if there are any complications, such as rusted bolts or other issues, it may take longer. Always refer to a repair manual for detailed guidance on this task.