Kodiak C5500 Brake Warning Alarm Problem

[KodiakRV]

It's Christmas Day, we are 1,200 miles from home and our motorhome built on a 2005 Chevy Kodiak C5500 chassis (8.1L gasser) has a brake warning light/alarm problem.

 

It first happened a couple of days ago. The manual says that the brake warning lights and alarm may come on when braking and turning at the same time, which we were. It doesn't say anything about what mechanical condition causes it or under what conditions it will reset. It stayed on until I got the MH stopped. Each time I started the engine, it came on again. Finally, I was going to try to make it somewhere off the highway and the alarm stopped about 200 feet down the road. Based on the manual statement that it might be "normal", we kept on going.

 

The next day, we stopped for lunch and when I started the engine the brake alarm came on again. After restarting the engine a couple of times without effect, we started out and again it quit within a few seconds.

 

Last night, after sitting for a few hours, we started out and the brake alarm went off when we were sitting at the first red light. This time it would not turn off when we rolled again. It remained on for the 15 minutes it took us to get to a safe overnight destination.

 

In all cases when the brake alarm was sounding, braking and power steering seemed absolutely normal. Both halves of the brake fluid reservoir are full.

 

There is a Chevy medium duty truck place in the town we are stopped in, but I'm concerned they may not be open or be able to work on it in this holiday week between Christmas and New Years. I'm calling them in the morning. Fortunately, we were going to be staying here in Austin for a few days, but we need to be on the road home this Saturday.

 

Any advice or previous experience on this?