One problem related to brake sensor has been reported for the 2004 Chevrolet 1500. The most recently reported issues are listed below.
The brakes failed in my driveway due to rusted steel brake lines. It cost me $914. To fix. This is probably a defect in design because the manufacturer failed to use a plastic cover over the brake lines. Also, the abs sensors in the front wheels also failed, leading to periodic engagement of the abs system at slow speeds, such as approaching intersections or at stop lights. My mechanics told me these were common failures for this vehicle.