Formally called the Chevrolet C/K, C/K is a series of trucks manufactured by General Motors and marketed under the Chevrolet and GMC brands. The C/K line includes pickup trucks, medium-duty, and heavy trucks.
Apparently you have something else wrong that is affecting your steering column that is making your bearings break. It could be something wrong with your steering box or your rack and pinion. Something might be misaligned or shoved out of correct alignment.