Five problems related to brake master cylinder have been reported for the 2001 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 GMC Sierra 1500 based on all problems reported for the 2001 Sierra 1500.
While driving in downtown city area, vehicle in motion, attempted to apply brakes and pedal went straight to floor almost causing an accident. There was no warning to loss of braking system. Vehicle was brought to residence and reviewed. Brake lines from master cylinder have suffered rust damage and caused a failure of the braking system. Upon further review all brake lines on vehicle are exhibiting extreme corrosion to a system that should not be rusting.
Main brakeline from master cylinder to rear differential rusted through and leaked resulting in a no brake situation.
I was traveling close to my home and was making a left turn on a country road. I went to apply my brakes with no result. The peddle went all the way to the floor. I shifted the vehicle into low gear and finally made it home. I had to have the vehicle transported to a shop for repairs. The cost to fix the brakes lines, master cylinder - $1000. Not happy with GMC and will probably never buy another american made vehicle. I also have a chevy tahoe and I have had nothing but problems with that vehicle as well.
While bleeding the rear disk brake calipers in the driveway, the steel hydraulic tubing from the brake master cylinder to the rear brake calipers burst due to excessive rust. The result was a quick loss of hydraulic brake fluid. Had this happened on the highway, all braking would have been lost due to the fact that the hydraulic fluid reservoir is not divided into front/rear compartments. After the leak, the brake pedal went right to the floor.
A steel brake line was rusted and failed leaving limited braking for the vehicle. All fluid drained from the master cylinder.