One problem related to power steering pump has been reported for the 2005 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 GMC Sierra 1500 based on all problems reported for the 2005 Sierra 1500.
Recently, I spent three days performing preventive maintenance on my 2005 GMC sierra and found two primary issues that shouldn't be occurring on this young of a vehicle. The first was rotted sections of brake line (supposed to be stainless steel) in the rear of the vehicle (the main line that comes back from the master cylinder) and the second issue was a leaking seal in the power steering pump. There is a considerable number of people with the same problem who have qualified for a recall or work to be done under a technical bulletin, but apparently my VIN lies outside of the acceptable range.