Service Brakes Soon

[P offshore]

I get this message at highway speed (70mph+) in my 2008 Yukon Denali....
Everything is normal but this message....

Any ideas?

 

[Gzes]

check n see if its good? if so just disregard it... or take it to the stealership to get the code off

 

[stevek]

Check to see if your brake pedal is sticking

 

[strick10]

I don't see how it could be just a code it you only get it at 70+,

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[domin8]

ABS problem?

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[mattah]

I didnt know the DIC is that smart lol.

 

[P offshore]

Everything seems normal braking, pedal movement, etc....

 

[P offshore]

Ok....
They cleared the code (299 I think) and now the "Service Brakes Soon" message comes on every time the key is turned on.......

Help!!!

 

[P offshore]

Anyone?

 

[Chris Goione]

I know this is an old thread, but I wanted to put this here, in case someone has the same problem, and Google leads them here. I had the "Service Brakes Soon" annoyance on a 2012 Chevy Avalanche. It would only come on intermittently, usually on the highway. First try was a new Brake Booster Sensor, which did not do the trick. I tracked it down to being a leaking O-ring between the Master Cylinder and Brake Booster. You can fix this in about 15 minutes. Remove the Master cylinder from Brake Booster by taking off two 15mm Nuts. Remove old O-Ring, and replace with new O-Ring. I used a slightly thicker O-Ring just trying to get a better seal. That cured the "Service Brakes Soon" for good. Brakes felt better under foot also. Hope this helps someone, it's a tough one to track down.