Service Stability

[xMaRz]

Hello, I have a 2006 Avalanche Z71 and replaced the ball joints not long ago. On the DIC I am getting a "service stability" message. When it comes up it feels like the brakes are starting to grab. Then they gradualy start grabbing more, until the point where I can not get the truck above 20mph with the gas to the floor. All of this happens within about a mile to a mile and a half. When I was doing the ball joints I had pulled the brake caliper completely off, so I lost a lot of brake fluid from doing so. It was very late at night, and my neighbor had given me the idea of putting power steering fluid in the brake reservoir. He mentioned the line from the side of the power steering pump that runs up and into the backside of the reservoir assembly, so I figured it would be fine. It was only about 8-12oz of fluid. Anyways, as soon as the problem started, I flushed the entire system, cycled about 3 quarts of brake fluid out of it to ensure it was completely flushed, and bled the brakes again. This is where I am at now. I completely reserviced the brakes, and they are still grabbing. I appreciate any help you all can give me! I tried disabiling the Stabillitrak system, and it didnt do anything. The brakes still started to grab, and then basically locked up. Thanks again for any info!!

[jro909]

i want to say its the sensors in the brakes...a guy had a similiar issue awhile back..

[gmtech4]

take it to a dealer ,you need it scanned ,internet is no help to you unless you get a code ,but while its there ,get it fixed sorry.