In that case you can cut off the old line in sections as you work your way back to the master cylinder. Assuming you don't have anti-lock brakes, GM uses a design with four lines coming out of it. You should be able to follow the line to the correct port. Save all the pieces so you can add them up to get the right length.
Be aware that they use a master cylinder with a valve that blocks fluid flow to any line with a leak. That valve can also trip during bleeding procedures. If necessary, you may need to give a quick, short blast of compressed air into the open bleeder screw to reset that valve, then just let the line gravity-bleed. Never press the brake pedal more than half way to the floor. Besides damaging the master cylinder on any car, doing that will trip that valve too.
If you do have anti-lock brakes, just follow the steel line to the port on the hydraulic controller. The rest of the bleeding procedure is the same.
Saturday, April 12th, 2014 AT 3:07 PM