One problem related to brake disc rotor has been reported for the 2004 Chevrolet Avalanche. The most recently reported issues are listed below.
When replacing (for the first time) the rear brakes on my 2004 Chevrolet Avalanche at 28,767 miles, I was informed by the dealership that the rear rotors had severe corrosion. The rotors were pitted such that they would require replacement. I asked about my 3-year bumper-to-bumper warranty because there was nothing I did to cause the defect. The dealership said that gm would not warranty the rotors. I contacted gm to inquire about the corrosion and their warranty as published in the sales brochure and warranty booklet. Plus, I have owned gm products for 30 years and never had any corrosion; brakes or otherwise. They replied that there was no defect in the parts; and that's it. As far as they are concerned, case closed.