One problem related to hydraulic power assist steering system has been reported for the 2002 GMC W Series. The most recently reported issues are listed below.
While driving loss the ability to steer and brake. Consumer states that the steering gear box had previously been replaced due to a loss of power steering when braking, however after replacement, consumer lost all power braking and steering, steering gear box was replaced again and after a few miles consumer returned to dealer who found the steering box leaking oil, the loss of power steering has not yet been resolved.