Unless you work the truck real hard then it should be changed about every 40.000 miles. I believe your truck has a transmission filter on the bottom of it and I would change that every other oil change. I think it is a screew on filter.
How often do you change the transmission fluid in a mercedes benz c240
How to change or add transmission fluid to a ml 350 benz
100K miles transmission oil flush & change.
100,000Km
You should change your automatic transmission fluid in Toyota gearbox at least after every 30,000 miles.
How often to change atomatic transmission fliud in a 2003 grande am gt 3.4 liter
every 100k when using AMSOIL Synthetic Universal Transmission Fluid
BMW transmissions are "lifetime fill" meaning that they don't recommend changing the transmission fluid.
How often should the transmission be drained on a 2005 kia sendoa lx?
Change the fluid and filter every 36,000 miles.
60.000
15000 miles