GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 6 of 6
  1. #1

    Default 2000 Suburban brake pedal puslating

    My 2000 Burban with 128,000 has developed a pulsating brake pedal at very low speeds with light brake pressure at crawling stops. It is very sporadic. I can't duplicate the issue at hard braking. It feels light the ABS is engaging. It makes a noise when the pedal pulses like it's a motor or something coming on and moaning when it happens???? I'm about to replace both front wheel hub units, and also going ta get new front rotors and pads. What else could it be??? Thanks for your input.. Scott

  2. #2

    Default

    Quote Originally Posted by sdjonedge View Post
    My 2000 Burban with 128,000 has developed a pulsating brake pedal at very low speeds with light brake pressure at crawling stops. It is very sporadic. I can't duplicate the issue at hard braking. It feels light the ABS is engaging. It makes a noise when the pedal pulses like it's a motor or something coming on and moaning when it happens???? I'm about to replace both front wheel hub units, and also going ta get new front rotors and pads. What else could it be??? Thanks for your input.. Scott
    From what you are describing it sounds like the abs is kicking on. This is a known issue with your truck. It is caused by corrosion between the abs wheel speed sensor and the hub assembly. I have had success removing the sensor, cleaning the mounting area with sand paper and reinstalling the sensor. replacing your hubs will also fix it. Make sure that you buy a quality hub, MOOG or Timken, not some knockoff ebay crap or you will be in the same boat in six months.

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  3. #3
    Sr. Engineer Dana W's Avatar
    Join Date
    Dec 2011
    Location
    Chuluota, Florida
    Posts
    361

    Default

    My 99 burb has the shakes too, but only when applying moderate brake pressure above about 30 mph. I know it is definitely worn hub bearings in my case, but there are a couple more things that could cause it too. Like Pikey said, it could be the ABS sensor, or the hubs are so bad that the sensor loses its read on the indicator ring, or the rotors could be warped. Those tiny little rotors that come on the K1500 are notorious for warping because they are so small they get very hot, and the least little error in torquing the lugs will make them get all wiggly.

    My Suburban came with 20" Eagle Chrome rims with 285 50 20 tires on 'em. I bought it used, and not because it had pimpy rims. Those rims have an extreme offset and they are the cause of my hub failure. The tires almost stick out from under 2 1/2" fender flares. They're about 12" wide and don't rub the frame or inner fender.

  4. #4

    Default

    Quote Originally Posted by Dana W View Post
    My 99 burb has the shakes too, but only when applying moderate brake pressure above about 30 mph. I know it is definitely worn hub bearings in my case, but there are a couple more things that could cause it too. Like Pikey said, it could be the ABS sensor, or the hubs are so bad that the sensor loses its read on the indicator ring, or the rotors could be warped. Those tiny little rotors that come on the K1500 are notorious for warping because they are so small they get very hot, and the least little error in torquing the lugs will make them get all wiggly.

    My Suburban came with 20" Eagle Chrome rims with 285 50 20 tires on 'em. I bought it used, and not because it had pimpy rims. Those rims have an extreme offset and they are the cause of my hub failure. The tires almost stick out from under 2 1/2" fender flares. They're about 12" wide and don't rub the frame or inner fender.
    I would say that pulsing at 30 mph is warped rotors. That is when you feel warpage best. Mid speed moderate brake pressure.

  5. #5
    Sr. Engineer Dana W's Avatar
    Join Date
    Dec 2011
    Location
    Chuluota, Florida
    Posts
    361

    Default

    Quote Originally Posted by Pikey View Post
    I would say that pulsing at 30 mph is warped rotors. That is when you feel warpage best. Mid speed moderate brake pressure.
    They probably are warped too, but I know the bearings are toasted. I can get vertical movement in the hub.

  6. #6

    Default

    Thanks for your help. I just purchased the hubs last week. Timken brand. I'm also going to install new rotors and brake pads while I'm at it....


    Scott

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •