Hi there folks, I'm new in this SUV world. I just bought my first truck in life, I went with a 2006 Suburban 1500. I got a real good deal for it and the truck is running real good but im a little worry about doing some maintenance on it. I'm more into Japanese car and i have always had honda and toyota, I still own a Prelude and a mr2 but i wanted to try an american truck for awhile and have some fun in winter. Well here is my question. When i drive the truck it shift good but i hear a whining sound coming from the transmission. so i would like to change the oil and also change the pump filter. Here is my worries.... i heard to many story about changing the transmission oil and i dont want to change it and caused the tranny to blow on me. It goes good but i have no idea if the old owner had done any services on the truck,. I will need some advise and i would like to know if i can do anything else beside changing engine oil and transmission oil... I was thinking about the transfercase , rear diff but i have no idea where to start with a 4x4 truck... Thanks for your time and help.