Brake Issue - 2007 Tahoe - 106,000 Miles
Brake pedal went almost to the floor before brakes engaged. Until I was able to get off road brake pedal was mushy and I had to pump the brakes up to get them to engage. After getting car off the ro...
Forum Discussion
I've had this happen more than once on older cars - classic sign
that you master cylinder needs to be replaced or rebuilt.
If your brake fluid is turning black, then the rubber cups are breaking down. This will let fluid past them when you press the
brake pedal but you are not leaking brake fluid. (do a google search)
Do the following:
with the Ignition off put very slight pressure on the brake pedal,
does the brake pedal slowly sink? if so then your master cylinder
needs replacing. (this test may take a minute or 2)
Try the same test with the engine running.
If you have brake drums - remove them and see of there is dampness
around the wheel cylinders.
that you master cylinder needs to be replaced or rebuilt.
If your brake fluid is turning black, then the rubber cups are breaking down. This will let fluid past them when you press the
brake pedal but you are not leaking brake fluid. (do a google search)
Do the following:
with the Ignition off put very slight pressure on the brake pedal,
does the brake pedal slowly sink? if so then your master cylinder
needs replacing. (this test may take a minute or 2)
Try the same test with the engine running.
If you have brake drums - remove them and see of there is dampness
around the wheel cylinders.
