One problem related to power assist brake vacuum has been reported for the 2000 GMC Yukon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 GMC Yukon based on all problems reported for the 2000 Yukon.
Vacuum plate behind the brakes rusted and rubbed against the rotors. Dealership didn't know what was causing the plates to rust. The rotors and brakes were replaced.