One problem related to power steering failed has been reported for the 2002 Chevrolet Silverado. The most recently reported issues are listed below.
Dt: the steering is difficult to steer when making left turns at low speed. Took to a dealer for this problem and the dealer thought this to be a power steering pump failure. The pump was replaced and steering gearbox as well. Dealer said the gearbox would have to be replaced to correct this failure. No problems since the repair. The steering gear box had been repair before per a service bulletin.