One problem related to brake abs warning light 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.
I own a 2004 GMC Sierra 1500 z71 with 32,000 on the odometer. On the morning of 27aug2008 the abs motor located on the framerail under the driver's seat turned on immediately upon turning the ignition to on. The abs light came on the dash. I had to continue and drive to work. The light stayed on the whole time. Once I arrived at work I removed the fuse for the motor. Now I have no abs and the lights are on all the time. This is the second time this has happened on this vehicle. The first time was only a few days after it was purchased. It was replaced under warranty. The warranty has expired and it will cost approx. $900 to repair. After some investigation online, I have found scores of people that have had the same problem. There is currently no recall in effect according to this website. I feel that this is unacceptable. This is a very clear safety issue. Not only does it render the vehicle without anti-lock brakes, it drains the battery if the fuse is not pulled soon after the problem emerges. This could leave someone stranded in a variety of conditions if they were unable to pull the fuse or not a full understanding of vehicle electric components. I am even more disgusted that this has happened twice on a vehicle that only has 32,000 miles on the odometer and cost almost $40,000. General motors should be forced to replace the defective components and/or upgrade to a higher quality unit free of charge to the victim.