One problem related to brake hoses, lines/piping, and fittings has been reported for the 2010 GMC Savana. The most recently reported issues are listed below.
Rear drivers side brake line began leaking just in front of the rear wheel causing the rear brakes to fail and shifting to the front wheel brakes only which enabled me to drive it slowly to a gm repair shop. Seems like a vehicle with just 17,559 miles on it should not be experiencing a failed brake line. Repair cost was $443. 62 with the gm shop stating that the gas tank had to be removed to fix the leak. Service writer claims the brake line was contacting other body parts which caused the failure.