How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask MPMoore Your Own Question

MPMoore
MPMoore, GM WORLD CLASS/ASE MASTER W/L1 GMC
Category: GM
Satisfied Customers: 2809
Experience:  15 YEARS AS GM TECH, TEAM LEADER/SHOP FOREMAN AT A GMC DEALERSHIP
Type Your GM Question Here...
MPMoore is online now
A new question is answered every 9 seconds

Yukon: When I press on my brakes going downhill, it feels like shakes.

Resolved Question:

I have a Yukon 2007. When I press on my brakes going downhill, it feels like shakes. I have never had problems with brakes on this age of a car. Are there any known defects on brakes for a 2007 Yukon?
Submitted: 4 years ago.
Category: GM
Expert:  MPMoore replied 4 years ago.
How many miles on the truck??
Customer: replied 4 years ago.
53329
Expert:  MPMoore replied 4 years ago.
Thats not alot of milage on the brakes for this truck, but its no longer under warranty. This is not real common on the yukon and this is not normal. You have a rotor or rotors that are warped/out of round. It may pulstae a little bit during normal braking but get worse when going down hill. This is due to the brakes getting hot, the puslation will get worse.

GM has a bulletin for a concern that may be the issue that caused this.

#PIT4611: Front Brake Pad Spring Clip Design Change - keywords appearance drag heat hot noise pedal premature pulsation repeat rotor scoring vibration wear - (Mar 26, 2008)
Subject:Front Brake Pad Spring Clip Design Change
Models:2007-2008 Cadillac Escalade, Escalade ESV, Escalade EXT
2007-2008 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2005-2007 Chevrolet Silverado Classic with RPO JF3 or JF7
2007-2008 GMC Sierra, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL
2005-2007 GMC Sierra Classic with RPO JF3 or JF7
1500 Models Only


The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:

During mid production of the 2008 model year a design change was made to the front brake pads, pad spring clips, and caliper brackets. This new spring clip is designed to pull the pad off the rotor slightly more than the original design. This helps to reduce front brake noise, rotor pulsation, and helps to prevent metal transfer between the pad and rotor (scoring). The pictures below show the differences between the 2nd and 1st designs. When servicing a 2008 model, ensure the correct parts are used. It is not recommended to install the new/updated parts on a vehicle built with the original design parts due to future servicability concerns.

 

 

 

You may want to take the bulletin number which is pit4611 and have them inspect the brakes for this issue. The only way to get rid of the pulstaion is to machine the rotors.








MPMoore, GM WORLD CLASS/ASE MASTER W/L1 GMC
Category: GM
Satisfied Customers: 2809
Experience: 15 YEARS AS GM TECH, TEAM LEADER/SHOP FOREMAN AT A GMC DEALERSHIP
MPMoore and 6 other GM Specialists are ready to help you
Customer: replied 4 years ago.
Approximately, how much does this cost? Why would this happen? I would think they would offer to correct this since they did for the newer models. I appreciate your help.
Expert:  MPMoore replied 4 years ago.
Again since you are out of warranty, they may not help you. You can ask them to repair this under a "goodwill" warranty. GM gives most dealerships the power to perform warranty repairs out side of the normal time and milage. This would be up to the service manager to decide. If you are a real good customer, you stand a better chance. If they refuse, you can try calling 1-800-gmc-truck, this is the customer assitance help line. Ask them for help, they may help you. They will contact the local dear rep for your area and he can make the descision.
The cost to you should be around $200 if they do not replace the pads, about $150 more if they do. They also have a updated part for the front brake pads to help reduce brake noise, make sureif they replace the pads, they use the new number. The dealer whould have to check the part number to find the new pads. Just ask them to make sure they use the new number for the pads.

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
< Last | Next >
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Gary

    GMC Technician

    Satisfied Customers:

    903
    15 years gm master tech/15 years ASE master tech
< Last | Next >
  • http://ww2.justanswer.com/uploads/ggrote1/2009-06-27_031011_me.jpg Gary's Avatar

    Gary

    GMC Technician

    Satisfied Customers:

    903
    15 years gm master tech/15 years ASE master tech
  • http://ww2.justanswer.com/uploads/CA/caprio23/2011-12-13_155550_20111213105344.64x64.jpg Anthony's Avatar

    Anthony

    ASE Certified Technician

    Satisfied Customers:

    476
    ASE Master Automobile Technician with over 20 years exp.
  • http://ww2.justanswer.com/uploads/Rocket2005/2009-09-13_133703_jack.jpg car tech's Avatar

    car tech

    ASE Certified Technician

    Satisfied Customers:

    448
    25 year master tech and shop owner
  • http://ww2.justanswer.com/uploads/2P/2paulm/2012-4-4_183431_justabswer.64x64.jpg Paul M ASE Master's Avatar

    Paul M ASE Master

    ASE Master Tech

    Satisfied Customers:

    187
    ASE Master Tech 20+ Years
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka- Moose)'s Avatar

    Chris (aka- Moose)

    GMC Technician

    Satisfied Customers:

    89
    16 years of experience
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    GMC Technician

    Satisfied Customers:

    360
    ASE Master Technician advanced level specialist
  • http://ww2.justanswer.com/uploads/DT/dt69nova/2012-6-15_234154_pic1.64x64.jpg Dave Nova's Avatar

    Dave Nova

    GMC Technician

    Satisfied Customers:

    2262
    ASE Master Certification. GM World Class Certification