One problem related to brake hoses, lines/piping, and fittings has been reported for the 2004 GMC C4500. The most recently reported issues are listed below.
Tl- the contact owns a 2004 general motor company 4500c. The contact stated while traveling 35 miles per hour the brakes were depressed and the brake line exploded. The failure repeated three times, and on each occasion the brake line was replaced by private mechanic. The vehicle was taken to the dealer and the manufacturer was contacted. The vehicle was repaired. The failure mileage 31,000, and the current 55,000. Rds.