Two problems related to brake sensor have been reported for the 2003 GMC Yukon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 GMC Yukon based on all problems reported for the 2003 Yukon.
Brake lines corroded resulting in loss of brakes and rear ending school bus. Replaced all brake lines at my cost as well as the damage to the front end of the truck. Now, the known abs brake sensor issue is activating the abs at low speeds.
While traveling to work my vehicles check engine light came on and the reduced power warning came on at which time I had complete loss of acceleration, complete loss of braking, and complete loss of steering power. I then had to coast to a stop and attempted to restart the vehicle 6 times before I was able to get the reduced power warning to go off and was able to drive although the check engine light stayed on. This is the 2nd time this has happened to me in 2 days with the loss of power. I have had the reduced power warning on numerous occasions years past but never have I lost total / absolute power to control the vehicle, this is a total death trap for anyone who has had this experience, especially on the freeway or highways at high speeds. I have read numerous accounts of this same issue affecting other GMC owners and have seen no resolutions or any recalls from GMC. I have already replaced the throttle housing and harness components, acceleration pedal sensor and yet the issue continues, someone is going to ( die ) because of GMC's lack of concern and responsibility to owners of their products. I will never ever own another GMC associated product.