brakes make a air sound when i press....help!

[memphisboi55]

hey yall,

my 99 tahoe makes a air sound like im putting air in a tire when i press the brakes.... and i have to press down kind of hard to brake as well.

do you know what this is? how to fix?
and how much it would cost?

thanks

:zav:

 

[mygreen98]

sound like a bad brake booster. check the vacuum line that goes to it.

 

[memphisboi55]

how do i do that?

 

[treepete]

theres a fat rubber hose that goes from the intake area to the brake booster. see if it has become disconnected.

 

[memphisboi55]

will do.

 

[PotentialTahoe]

Add brake fluid, pump the brakes, add more brake fluid, pump the brakes, check levels.

 

[memphisboi55]

will do.

thanks.

 

[Biggwaukegan]

if not check the tsb about brakes locking up at slow speeds...seems to plaque these older tahoes...had this **** one mine and it annoyed the living **** outta me untill fixed.

 

[memphisboi55]

yea, cause the adding brake fluid thing didnt work.

when i press the brakes, am i supposed to be able to see the brake fluid like move around as if air is blowing into it?

cause it did when i had my girl press the brake.

 

[mygreen98]

not necessarily. is pedal is hard at idle? if so, its one of 2 things, no vacuum to the brake booster, or the booster itself. with the car running , pull off the vacuum line going to the booster. there should be good vacuum on the it. if so, suspect a bad booster, and it will need to be changed.

 

[JP422]

perfect time to upgrade to HYDROBOOST!! Yea! Do it! Do it! Do it!

;oP

 

[PotentialTahoe]

yea, cause the adding brake fluid thing didnt work.

when i press the brakes, am i supposed to be able to see the brake fluid like move around as if air is blowing into it?

cause it did when i had my girl press the brake.

My appologies, but when I bought my tahoe I had the same problem and even got a hard brake because the system did not have a drop of brake fluid in it. I bought a big bottle of advanced brake fluid DOT and pumped the brakes, added more fluid and pumped the brakes, they work fine now. I am sure there is a small leak somewhere in the sytem, but I have been driving the truck for 6 months now and it hasn't given me any more problems, it would cost me mega bucks for a mechanic to go thru and find the leak so I leave it alone, it works don't fix it deal.