Vibration in Brake Pedal on 2004 Model

[jmccrone_20171]

I'm thinking of buying a 2004 Suburban. I test drove 3 last night from a local dealer. I felt a distinct vibration in all 3 when sitting in Drive with my foot on the brake. Does anyone know if this is usual for the Suburbans. I'm heading out to a different dealer later today. Thanks in advance for any assistance.

[smb88]

Are you saying while stopped and in drive with foot on brake or while driving and applying the brake?
Either way I do not have this vibration in my 2004 Suburban.
Check the Leak Thread on thuis forum and if you buy one let me know what happens to yours.

[jecahill]

I have an 04 Burb and I too have the vibration. It is quite annoying. I have discovered that it is present only when running the A/C. I have about 100 miles on it and I am hoping that it will just go away : ) If not, I will take it in, but have little hope that it will be resolved with the number of complaints I have heard about it.

[smb88]

Please eloborate on this vibration, what exactly are you doing when you notice the vibration?

Any of you notice the leak in the rear differential?

[jecahill]

The details on the vibe are this:
1. AC is on
2. Sitting stopped with foot on brake pedal
3. Funny feeling in foot

Additionally - I have heard my AC make some really strange sounds inside. Almost like a grinding and leaking air compressor... ?

I have not looked at the diff, but I intend to.