One problem related to brake electric antilock has been reported for the 2007 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 GMC Sierra 1500 based on all problems reported for the 2007 Sierra 1500.
I purchased a brand new 2007 GMC Sierra 1500 pickup from lone star pontiac Buick GMC in mckinney, texas on 11/18/06. Only after being pulled over for speeding did I realize the speedometer was not calibrated correctly after the dealership had installed an after-market lift kit and large tires and wheels on this truck. I discovered by calling another gm dealer that because the speedometer is not calibrated correctly it causes the anti-lock brake system to not function properly. The dealership willfully and without regard to the safety of its customers sold vehicles like mine that had brake systems that did not work properly. The general manager confirmed that they have sold many trucks like this so it is reasonable to assume there are many trucks on the road now which may have faulty anti-lock braking systems. I am concerned for everyone else that purchased one of these trucks and aren't aware their brakes don't work right. The general manager told me that the speedometers can not be calibrated correctly.