GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 5 of 5
  1. #1

    Question Brake issues on 1999 GMC Suburban

    I have a 1999 GMC Suburban 1500. The problem I am having is when I press on the brake pedal all I hear is air like it has air brakes or something and the brakes barely stop when idling or in reverse. When the truck is off it doesnt make the air sound when I press the pedal. I have bled the brakes and it has plenty of fluid. The brake pads have at least have life and there is no air in the brake lines. Help Please!

  2. #2


    sounds like you need to replace the brake booster

    2003 Z71 Silverado LS
    Access roll up cover
    Bed Rails
    Billet Grill insert
    Bed Rug
    CB with PA system
    Waiting to be installed
    Two 8in RF HX2 punch( would have 12s but they got stolen)

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


    At least check the vacuum line leading to the booster, but it is highly likely the diaphram inside the can has split.

  4. #4


    I was afraid of that. I was hoping for the master cylinder cause its much cheaper. Thanks.

  5. #5


    Do the test first. Sometime it is a cracked check valve. Sometimes it is a rotted hose
    2010 Chevy Silverado Z71 ext cab.4x4
    72 Monte Carlo 350-415 hp- sold (June 2011) to pay medical bills
    79 Impala 350 4bbl 375 hp- sold (June 2011)to pay medical bills

    "If He asks you to go a mile go two"

Similar Threads

  1. Brake issues on 99 Suburban
    By Mack46 in forum General Chevy & GM Tech Questions
    Replies: 3
    Last Post: 11-24-2011, 10:02 AM
  2. newbie from maryland (1999 chevy suburban issues)
    By cpa2be in forum GM Powertrain
    Replies: 4
    Last Post: 04-01-2011, 02:12 AM
  3. 1999 suburban heat/ac control issues
    By parkersnine in forum General Chevy & GM Tech Questions
    Replies: 4
    Last Post: 07-24-2010, 10:14 PM
  4. Door Lock Issues on 1999 Suburban
    By JustinKukuc in forum GM Electrical Tech
    Replies: 0
    Last Post: 02-08-2010, 05:51 PM
  5. Suburban brake issues
    By tbplus10 in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 9
    Last Post: 03-16-2007, 09:46 PM

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