gmc forums   gmc forums
Go Back   GMC Forums > GMC Vehicles Currently In Production > GMC Yukon Forum

GMC Yukon Forum Forum for discussions regarding the GMC Yukon


ATTENTION: We're looking for moderators. Is anyone interested?
GMC Forum: How to bleed/fix brakes GMC Yukon '04!?!?
Reply
 
Thread Tools
  #1  
Old 08-10-2010, 09:03 AM
Kyle C Kyle C is offline
Junior Member
 
Join Date: Jul 2009
Posts: 2
Default How to bleed/fix brakes GMC Yukon '04!?!?

We have been bleeding all day and barely getter any results. I beleive there is air in the lines from not clipping the lines closed while working on it. What is the trick to get the brakes properly bleed and working correctly? Please help!
__________________
Powered by Yahoo! Answers
Reply With Quote

  #2  
Old 08-10-2010, 09:03 AM
dangerII dangerII is offline
Junior Member
 
Join Date: Aug 2009
Posts: 4
Default

If you have drum brakes in the rear adjust them up while you spin the tires in a circle until you hear the brake shoes dragging against the drums and then bleed the system this way you get pressure built up in the hydraulic line leading to the wheel cylinders for each wheel.Then bleed the system out but as a rule of thumb start with the RR then the LR and go to the RF then the LF and repeat the steps until all air is out of the system unless you have a problem with the brake master cylinder or something else in the system.You didn't say what size the truck was as far as a half ton,3quarter ton or what?.But you can get a repair manual and do some reading up on it or just take it to a shop and have the system bleed and or fixed.
__________________
Powered by Yahoo! Answers
Reply With Quote
  #3  
Old 08-10-2010, 11:30 AM
Molson02536 Molson02536 is offline
Senior Member
 
Join Date: Dec 2009
Location: K/W Ontario Canada
Posts: 3,098
Send a message via AIM to Molson02536 Send a message via Yahoo to Molson02536
Cool

Quote:
Originally Posted by Kyle C View Post
We have been bleeding all day and barely getter any results. I beleive there is air in the lines from not clipping the lines closed while working on it. What is the trick to get the brakes properly bleed and working correctly? Please help!
Problems with bleeding brake systems can be frustrating when the system has been bleed several times to no avail. Under such circumstances, a
systematic approach is needed to tracing the problem:

1. Visually check the system and rectify any obvious leaks.

2. Begin the diagnostic procedure with the master cylinder. Remove one pipe and blank off with a spare bleed screw. If the pedal is good, the problem is further down the system, otherwise the problem lies with the master cylinder.

3. Reconnect the pipe and move to the next junction in the system (e.g. front to rear split). Remove one pipe from the junction and blank off with a bleed screw.

4. If the pedal is good, the problem is in the part of the system that has been disconnected. Otherwise the problem is in part of the system still connected.

5. Continue this procedure throughout the system until the problem has been isolated and identified.

6. Do not jump ahead of the systematic process since this can cause confusion.

7. Remember that vehicles fitted with rear bias brake valves will not bleed properly when the rear wheels are hanging freely.

Has there been any repairs done the the ABS controller or is this just a simple bleed? Open all 4 bleeders at the rear and front, let it gravity bleed until there are no more air bubbles or there is constant clean fluid. Close all the bleeders and get a helper to work the brake pedal.

Start at the Right rear and then work your way to LR then RF then LF until thee is no more air. Make sure your helper does not "Pump the pedal" but instead do it in the following order.

1. You: open the bleeder Helper: pushes down on the pedal slowly and a fluid motion, make sure you helper tells you when the pedal is on the floor,

2.You:close the bleeder Helper: releases pedal letting it come up slowly not letting it snap back to the stopper. this may take some time and make sure you check the reservoir frequently to avoid running dry. This is the most fool-proof way I have found to bleed any system! Hope this helps!

Keep us posted.
Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT -5. The time now is 02:28 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
gmcowners.com recognizes that "GMC", it's logos and various model names and numbers are registered trademarks of the General Motors Corporation. These terms are used for identification purposes only. gmcowners.com is not affiliated in any way with the General Motors Corporation, GMC or any other company listed herein. All information on this site is the opinion of its members and not the opinion of the site itself. 2014 Madison Ross Media Group. All rights reserved. Content published on GMCOwners.com requires permission for reprint.
MADISON ROSS MEDIA GROUP MARKETPLACE
Need products for your GMC Truck? Check out your options at the links below:

No special deals available at this time...