The first and foremost thing to do is to drive carefully. Do not speed as this will only make matters worse. A slow speed will allow you to have more chances of being able to break if you have to do so. The traction on ice is almost zero so if you speed, the pickup truck can very easily slip and get out of control.
Periodically keep on checking your tires. Make sure that they are in good condition and if they are wearing out, it is a good idea that they are changed. Driving on icy roads is dangerous business and one should not take any chances.
Make sure that you do not have to break hard. If you are driving slow, you will be able to have a better breaking abilities. If you break too hard or at a good speed, there is every likelihood that the pickup truck will spin out of control due to lack of traction and then there is generally no way to control it. So maintain a slow speed and do not break hard. If you have to break suddenly for any reason, never move your steering wheel and hold it firmly as the truck can go into a spiral and out of control.