Two problems related to brake master cylinder have been reported for the 2001 GMC Sierra 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 GMC Sierra 2500 based on all problems reported for the 2001 Sierra 2500.
The steel brake lines from the master cylinder back along the frame rail on my GMC 2500hd rusted through and failed the other day, causing pressure and fluid loss, fortunately while traveling at a slow speed close to home. Of the various vehicles owned over the years, this is the first time I have had a steel brake line rust through like this.
I have owned my 2001 GMC Sierra 2500hd truck since it was new. The vehicle currently has approximately 92,000 miles on it. On August 25, 2010 I was traveling approximately 45 mph towing a 14? trailer as I approached an intersection where the light changed. The road surface was rough. I applied the brakes firmly so that I could stop for the intersection. Due to the rough road the abs kicked in and when it did my brake pedal went completely to the floor and I had no brakes. I tried pumping the brakes, but nothing. By the grace of god, no one was hurt as I continued into cross traffic at the intersection. After pulling into the closest gas station, I found that the brake lines going from the master cylinder had both blown out. Once I had the vehicle home I inspected the brake lines and found all the lines in extremely bad condition. In fact the lines going to the front brakes were seeping brake fluid. Having owned many vehicles, most older than this one, I was shocked that brake lines were in as bad a condition as they are. Especially in a vehicle that isn't even 10 years old yet. Brake line failure is a catastrophe waiting to happen. The dealership indicated that gm is not stepping up to this problem - hopefully you will encourage them too.