One problem related to brake disc pads has been reported for the 2004 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 GMC Sierra 1500 based on all problems reported for the 2004 Sierra 1500.
Vehicle had less than 20,000 miles when right rear brake disc wore completely out. Had to replace again at 40,000 miles. This only affects the right rear brake. Truck has automatic transmission and parking brake has never been used, and is completely worn out. I know that there is a recall on manual trans mission, but seems there is also a problem on the automatic.