Three problems related to brake hoses, lines/piping, and fittings have been reported for the 1997 GMC Sierra. The most recently reported issues are listed below.
My brake line failed above the fuel tank, lost pressure to the braking system which resulted in no brakes. Why would car manufactures use steel brake lines that can rot out very quickly when exposed to normal driving elements.
After parking during my work shift, I attempted to leave work at 1530. Applying the brake to shift into "drive",the pedal went completely to the floor, and the abs light came on. I was unable to pump up the brake, and had to have the truck towed to a local dealer. It was determined the brake line had rotted out. The gas tank must be removed to effect repair. I had driven the truck from long island, NY to mays landing , NJ (about 145 miles) without incident, but the dealer told me I could have lost braking power at any time.
The brake line had rusted and leaked fluid.