Nothing at all!
The car is a great buy. When I purchased the car I was a little worried that this car would be a headache. But since I've owned the car I have not had any issues with it other than the normal wear and tear. This car handles great, and its off-roading capabilities are awesome. The only thing that annoys me is when I drop it into low 4x4 mode, the car beeps continuously until it is switched back to high 4x4 mode. I've towed with this car and barely noticed a difference. The JBL 10 speaker system is awesome. Good sound quality! Great Buy!
The 4LO beeps because it is not in 4WD. You need to put the truck in neutral first then switch to 4LO.