One problem related to brake sensor has been reported for the 2003 GMC Sierra 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 GMC Sierra 2500 based on all problems reported for the 2003 Sierra 2500.
Many components under the truck are severely rusted. Two brake lines failed in August 2011 due to rust. The rest are ready to fail soon. The power steering line rusted out this month (December). Rust at sensors of abs system causes erratic abs operation.