2001 GMC Yukon XL (Aka Beast)

[Run4st]

I opened it but I don't see any bad soldering or some stuff like that . I will add new thermopaste and rtv. This unit looks solid..came out from 2500 2000 suburban 8.1L

You mentioned from previous post you got some type vibration and growling from pedal. I got an 04 Yukon doing something similar. Had a hell of a time getting a decent brake pedal. Replaced lined and all 4 rotors and calipers (plus rubber lines that connect caliper to hard line). Fluid flushed. Every time I start I get a growl and jolt from brake pedal....it's worse when sitting over night on first startup. Lessons after being run for a a while. Brake pedal feels normal once you start driving...only get symptoms on startup. Did you have any of these symptoms? Anyone else?

 

[makintoshnex]

You mentioned from previous post you got some type vibration and growling from pedal. I got an 04 Yukon doing something similar. Had a hell of a time getting a decent brake pedal. Replaced lined and all 4 rotors and calipers (plus rubber lines that connect caliper to hard line). Fluid flushed. Every time I start I get a growl and jolt from brake pedal....it's worse when sitting over night on first startup. Lessons after being run for a a while. Brake pedal feels normal once you start driving...only get symptoms on startup. Did you have any of these symptoms? Anyone else?

Nothing like that. I have no idea what may cause it. I had that thing only once but I connect it with ABS because abs light was come and go and brake light switch was doing same thing.

 

[makintoshnex]

I installed TpM sensors today and did Ballance, while tires were out in a shop I took a peak on rotors. What you guys think. Should I replace them or they are ok.
After balancing truck drivers even better. Not shaking anymore. Abs light is still on, but it comes and go. Sometimes I got no codes and dash is without ABs and brake light, sometimes it's on randomly.

 

[Bigburb3500]

I installed TpM sensors today and did Ballance, while tires were out in a shop I took a peak on rotors. What you guys think. Should I replace them or they are ok.
After balancing truck drivers even better. Not shaking anymore. Abs light is still on, but it comes and go. Sometimes I got no codes and dash is without ABs and brake light, sometimes it's on randomly.

Rotors look crusty but fine. Do they have grooves on them or have a lip on the edge?
The pads might be aging a bit and need replaced but also not a great angle.

Did you install the new ABS module? All in all, there doesn’t seem to be much frame rust which is GREAT!!!

 

[makintoshnex]

Rotors look crusty but fine. Do they have grooves on them or have a lip on the edge?
The pads might be aging a bit and need replaced but also not a great angle.

Did you install the new ABS module? All in all, there doesn’t seem to be much frame rust which is GREAT!!!

No, no lip, light Saturn rings but nothing deep. Probably I will go with brake pads replacement. And I haven't installed ABS module yet. I want to do everything in one shot. ABS module, wheel speed sensors front, new pads. Oil change.