Brake Master Cylinder Problems of Cadillac CTS

Cadillac CTS owners have reported 5 problems related to brake master cylinder (under the service brakes category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Cadillac CTS based on all problems reported for the CTS.

car image   Brake Master Cylinder problem of the 2003 Cadillac CTS 1
Failure Date: 08/05/2013

This morning when I backed my Cts out of the parking spot to go to work I noticed the brakes were a little soft. I then parked the car and opened the hood to look at the brake fluid reservoir and noticed it wasn't completely full but there was still a sufficient level of fluid. I then looked at the ground and noticed a line of liquid that traced my movement backwards out of the parking spot and then back into the parking spot, this liquid was brake fluid. Imagine my surprise at having a second gm vehicle with a brake line failure 30 days after experiencing a brake line failure for the first time in my 40+ years of driving and owning vehicles. The first was a 2001 tahoe which I reported last month to NHTSA and which cost me over $1,000 to replace all of the brake lines. After work this evening I examined the Cts and discovered extreme corrosion in the two brake lines running from the master cylinder to the abs unit in the front of the engine bay. The corrosion is worst where the lines run behind the radiator and it appears both lines have failed. The lord must have been looking out after me because last night I drove 37 miles from baltimore on the interstate. Had the brakes failed then I imagine I would have been in a spectacular accident on I-95 that may have taken my life as well as others. Gm recalled the Cts for brake line corrosion by the calipers where the line connects inside a rubber piece. Nhtsa is investigating brake line corrosion on 1999 to 2003 full size gm trucks and pickups and I suggest the investigation be expanded to include all gm vehicles of this vintage as it appears gm used an inferior grade of steel in their brake lines in all of the vehicles.

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car image   Brake Master Cylinder problem of the 2004 Cadillac CTS 2
Failure Date: 07/07/2012

This vehicle has an intermittent problem with the brakes, when turning to the right or left like when parking in a driveway or a parking spot, the brake pedal looses pressure and starting kind of shaking like when the abs system engages and the car can't be stopped unless the brake pedal is released and applied very hard again so I can stop the car, it could happen at any given moment, I have asked several gm dealers and nobody is sure what the problem is, they are all guessing and can't guarantee to refund a diagnostic fee to troubleshoot the problem, some have said it is maybe the abs module, the master cylinder, a kinked hose, etc. I went to several forums on line and there are several people complaining with the same issue and nobody has had any acceptable answer from gm or any dealer, they all stated that the were not able to duplicate the problem so that they could not refund the diagnostic fee, I am very concerned about this problem since I feel I am playing a russian roulette with my vehicle, I don't want to get in the situation where somebody can be seriously hurt or killed, I don't want to sell this vehicle either without telling the new owner about this problem and get him into a very serious problem, so I am writing to you to please provide me with some advise to address this extremely serious problem. I don't drive this vehicle very often since the brake problem has happened to me several times and I don't want to gamble with my life or anybody's. Thank you.

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car image   Brake Master Cylinder problem of the 2003 Cadillac CTS 3
Failure Date: 05/08/2010

I have a 2003 Cts since new. The brakes almost completely failed last week. No dash light came on. The problem is easily seen. One of the lines from the master cylinder going to the abs unit badly corroded at the lowest point in its run where the line is supported. The line away from the support is in good shape so it looks like you have a design flaw or improperly implemented design with that support. I was extremely lucky and extremely disappointed. The car has never been in an accident and most of the underside body and hardware looks almost new. My dealer says they have replaced a number of Cts brake lines. You have a problem I had a lot of trouble with the Cts when it was new as you should be able to see from your records. Although replaced the rear differential still howls. I expected better from Cadillac. With that said I think gm ought to do something about the Cts brake lines.

car image   Brake Master Cylinder problem of the 2004 Cadillac CTS 4
Failure Date: 12/18/2006

The master cylinder in my 2004 Cadillac Cts has been replaced again for the 3rd time , twice in the last year (may 2007 and Dec. 2007).

car image   Brake Master Cylinder problem of the 2004 Cadillac CTS 5
Failure Date: 08/06/2003

When applying brakes pedal would go to the floor resulting in extended stopping distance. Dealer has been notified. The dealer replaced the master cylinder but the problem still existed. The dealer then bled the system . It appeared that the brakes were improperly bled during factory assembly.

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