Hello everyone,I have a 99 Escalade with 150,000 cross country miles.Last weekend I replaced the calipers,rotors,shocks the whole nine yards.I have a problem,when Ipress the brake pedal,it will pulsate,Which drives me crazy.I have bleed the system many times,thinking maybe I still had air in the lines.I was told that the new rotors did not need to be turned,so I did not turn them.What else can Idoto fix the problem.Can someone give me the correct way bleeding the brakes.Maybe I did it wrong?I really need this corrected soon.I will be leaving from California to Florida in a few weeks.Any help will be appreciated,thank you.

 

I have a 99 Suburban so it is the same vehicle as your, just a bit longer. Pulsating pedal?

I would start easy and make sure my front tires were properly inflated. When you changed the rotors did you put the same wheels and tires back on the same wheel they came off? I'd check my wheel balancing too. I find these big rigs are very fussy about air pressure and balancing.

Rotors, are they set correctly?

Next, what about the ABS sensors, did you put them back on properly?

Calipers, are the pads put on securely are all fasteners tight?

Bleeding the system, you need two people to do it. Here's how I was taught. Get a helper, a must to pump the pedal. You need a flexible tube or vac*** line and a clear jar with brake fluid in it. Attach line to bleed screw and put other end in the bottle. Make sure jar is below cailper and brake lines going to caliper. Sometime you will see air bubbles right away when the line goes in the jar. Get helper to pump the pedal until no air bubbles in the jar. Tighten bleed screw.

Last, how about your master cylinder? It is 7 years old, maybe it is getting weak.

Just a few ideas.

 

Ok,I have checked everything that you have mentioned,besides the balance on the wheels.But wouldn't the balance be affected all the time?I only get pulsating when I start to break.When I am not on the break she rolls very smooth.Thank you for your thoughts.

 

I had a problem with the tires on the front, I'd get a wiggle in the wheel and a Hmmm at highway speed. I changed the front bearings and it was still there. Finally I balanced and rotated the tires and it went away. I just find that these trucks are touchy with tires and wheels and balancing. Sometimes you get a tire wear pattern or a belt that is off that isn't too noticeable when driving but braking will always seem to bring out these faults. Hey, I make my living as a VP Finance so I'm far from an expert. You are right in that balance would be off all the time but you really only interact in a sensory way with the wheels when you put your foot on the pedal to stop and you can feel it. A slight imbalance may not be noticeable when driving. I think if you rotated the tires you could isolate the problem or at least eliminate a possible cause.

Forgot to say that the rotors out of the box should be good to go, no need to turn them. What quality rotor did you buy, GM or aftermarket? Also thinking about your alignment, how is that?

 

You know rear drums out of round would so the same thing. Are you sure it is the front brakes. I mean everything there is new.

 

I own a 2000 Escalade with about 111,000 miles, and I just replaced my rotors, shocks, and brake pads. I did read that you are not supposed to do any emergency braking for the first 200 miles. Those conditions would cause damage to the rotor. Mine are working just fine.

 

what u need is a gm scanner on it

it sounds like you have premature abs kicking on big problem with these vehicles

what happens is when u r braking the sensor are supposed to be with 3km/h of each other what happens is one drops off which causes the brakes to pulsate

do u have rear disc brakes
just look at the inside of the rotor make sure there is no rust build up

u can remove the abs sensor clean it off
lub it and place it back
this works for a while
then u end up replacing the front hubs