One problem related to power assist brake has been reported for the 2004 GMC Sierra 3500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 GMC Sierra 3500 based on all problems reported for the 2004 Sierra 3500.
The contact owns a 2004 GMC Sierra 3500. While attempting a turn, the power steering and power brakes failed. A mechanic stated that the power steering shaft snapped and caused the failures. The contact has had the power steering and power brakes replaced on four separate occasions for the same failures. The speed was unknown. The failure mileage was 40,000 and current mileage was 67,000.