bobbygrn24

I have a 2000 Z71 4wd ext cab with 5.3L that shakes randomly when braking. It seems to be worse with a passenger. The whole entire truck will shake. Sometimes it will start to and then smooth out other times not at all. I have replaced both upper control arms, lower on left side, left and right hub assembly and rotors along with pads on front, idler arm, abs pump and mod and new tires. Any ideas would be greatly appreciated I'm almost $2000 in and at a loss. Thank you for your time.

tech2

does the shake transfer into the steering wheel or brake pedal?

bobbygrn24

No Sir, I don't feel anything in either, it doesn't pull to one side or the other. I have made stops with it shaking and let go of the steering wheel and it keeps straight and it doesn't start doing it until after I have made several stops, the more stops I make the more it shakes

intheburbs

Warped rear drum?

bobbygrn24

Four wheel disc but I have had that thought and when I asked around no one thought rear warped rotors would cause that kind of shake. I will differently give it a shot and report back. Thank you...

intheburbs

I've warped a lot of rotors in my life. Several of them shook pretty hard - kind of like hitting a specific resonant frequency - at a particular combination of speed and pedal pressure.

bobbygrn24

Gotcha, I appreciate the info and will get them turned this weekend.

bobbygrn24

Thank you for the help. I finally got a chance to replace the rear rotors and brakes and she stops as smooth as glass. Thanks again you rock.