Originally Posted by bdtaylor1979

How many miles does the truck have and has the brake fluid been changed before?

If you have a lot of miles and its never been done before it probably wouldn't hurt to flush it. Over time the brake fluid wears out just like oil or trans fluid.

Originally Posted by Vincent Martinez

It's in the area of the lower 200K miles. That'sexactly my train of thought! Better to do it than to chance it!

Originally Posted by bdtaylor1979

Ok. With that kind of mileage, if flushing the fluid doesnt help, you might check to see if your brake lines and calipers are in good condition.