Thank you for the input..Temps work great , just can't seem to direct the air where it needs to go. lol.

I'll be out tomorrow at least checking vacuum at the intake and branch out from there...We'll do a vacuum line at a time..

 

I really need help finding out what this missing hose is if some one or anyone knows please help, it’s right on top of the air intake.

 

There's a large diameter hose/plastic tube that runs from that down to the passenger side valve cover. That is a massive vacuumn leak right there

 

Yeah it’s a huge vacuum leak, if you could send me a pic of where the hose goes in on the valve cover that would be so sweet I have to go buy a new hose as it’s not there

 

Burrrr it's cold out there lol

 

you seriously rock rock man I can’t tell you how much I appreciate it. I wish you a merry christmas

 

No problem, merry Christmas to you as well!

 

Hi All,
Would my 2000 Olds Bravada have the same vacuum lines with the all wheel drive? Also, just behind the front bumper, and in front of the bottom of the radiator, is some type of valve that has vacuum lines. Any info on what it is and sizes of vacuum lines?
Thanks,
RTJ49

 

Thanks Christine_208 for the great info. Just wandering if your Blazer has the 4 button or 3 button control and if mine would be the same for the needed vacuum hose. I have a 2000 Blazer, thanks again for all your work and info.

 

I guess I forgot to include that information. My 1999 is a 4-button one. I think there could be a difference between the 4-button and 3-button vacuum hose configurations. Also I know that after a particular year a vacuum switch was moved to bracket that hangs off the lip at the top, center of the firewall. Mine has one of those.

Whatever the details of your system, it is well worth replacing the hoses. They inevitably will rot with age. I used my drill bit set to determine the inside and outside diameters of the hoses.