Brake safety. Are your brakes up to the task. A simple test

[Bob Dunahugh]

I do this at home. Many weeks before each trip. Start the engine. Put both feet on the brake pedal. Then push down on the brake pedal. Absolutely as HARD as you possibly can. This well put way more pressure on your system. Then in a panic stop. If you have any weak lines, or components. This test will bring those weak points to light. Isn't this better having this happen at home. Then having YOUR face in the windshield. As your GMC comes in contact in the back of a tractor/trailer. I do it on every thing I have. It's a must after all brake servicing. If you have just installed stainless steel lines. Do a longer test. As the SS lines are made of a harder material. Then check every line connection. Bob Dunahugh