One problem related to power steering pump has been reported for the 2005 Chevrolet Silverado. The most recently reported issues are listed below.
The 2005 chevy Silverado crew cab, just started without notice getting very hard to steer from a stop or slow speed, noticed a "grabbing" of the wheel when slowed to make a turn. Determined the cause to be the power steering pump went out, no further details were given, and the part was replaced.