Damn!! Thank You so very much!!! Ive been searching for this for 7yrs!!! I hooked a long vac line to that onto that plastic T you put a cap on. I wrapped the line around my side mirror, then when i needed my 4x4 id roll down my window, suck on the line, push the 4x4 button & then quickly stick a golf tee into that vac line! 😂 Finally mystery Solved!!!

I found this issue working on some thing else on my s10. Saw that some random vacuum lines were deteriorated near the area I was working. replaced the lines and found this video after the fact and watched to make sure I put it back the right way. Luckily for me there was a piece of old hose coming out of the fender component nipple.

Thanks you so much !! My 4 x 4 ZR2 Sonoma wouldn't go into four wheel drive and mechanics at shop couldn't find vacuum leak. They saw the short 5/32" line and plugged it and four wheel drive kind of worked. They sent me home with it that way. I came across your video and removed the 10mm bolt and found the nipple where the line attaches. Took it back to them and showed them. My four wheel drive is FIXED THANKS TO YOU!! Jan

Awesome thank you!!! Just got my 2000 jimmy 2weeks ago and just found this line yesterday. Couldn't find where it went and found a bunch of videos and posts online of people with the same issue. Thanks

I just want to add my thanks that you solved this mystery. I too thought it didn't make sense to have an open vac line but at the same time since I didn't see any connection and the open end looked to have never been connected ,thought maybe this is how it was designed . So glad I came upon ur video by chance .

This was actually pretty helpful thank you very much. The way the hose was laying, so the opening was pointed towards the other fender. So I was looking in the wrong area.

THIS SAVED ME. Thank you.

I had this mystery. You solved the mystery. Thanks!

Oh my god thank you! I had found many videos on “ this is your problem, and here is we’re two of vacuum lines are. There one somewhere here. “ Thank you for describing exactly where the nipple is.

Very good information, I was having the same problem, thanks. Keep up the good work.

I never comment on videos, but seriously, thank you for this!

I’ve been looking for this solution since I had my clutch replaced last year , thank you!

Thank you so much. I appreciate it. I couldn't figure it out.

Thanks, I just started looking for this. You saved me time on this one.

Thank you.. Good job! 👍

Thx for the video , I’m hoping that’s my issue on my 5.7l

Good job buddy, I’m restoring a 2002 ZR2 model and feel your pain on solving vacuum mysteries lol. Beautiful Blazer!

Awesome man, thank you.

,,,,,,,,,,,, GREAT JOB,,, AND FIND,,,,

Thanks so much, one more riddle solved.

I’m trying to find where the hose that Ts off the check valve goes to. I have the one going into the sidewall, just not the one that goes down to I don’t know where. It’s the hose right next to the one that you just hooked up.

Thank you! Thank you! Thank you sir!!!

Thank you my rz5 had the same issue

My 2nd hand 98 2.2L LS had an audio intake vacuum leak 3' hose from one of the top ports which I capped on the Throttle-B routed in the direction to the left fender. I found the same extremely deteriorated hose but it's 7/32 GM1486-M 111497. The label outlasted the hose's structure. Cheating GM hoses were made and installed on all Chevy vehicles back in the 90s. So, 30 years have passed. Anyway, mine was also just hanging around like yours. What I don't know is where the 3rd line connects to? Some videos show it connects to a round hood HVAC Reservoir canister which I don't have. Is it missing? I don't have a 4x4. The check valve may have fallen off to the pavement years ago because the end of the hose crumbled. Now, I don't know if I just connect the new hose directly to the fender vacuum canister's barb. Glad you pic that male Barb.

Muchas gracias

Been chasing vaccum issues and switch issues since purchasing my '99 five years ago. I wish they hadn't gone space-age with their 4wd systems and just used cables, but that may just be my personal preference lol

I’m trying to fix my 1999 2wd 4.3 s10 and I’m having a misfire on idle, shortly after I found this entire 3-way hose sitting under my brake booster. Thankfully to you I found the vacuum canister now so I know where one hose goes but where does the other two? Any tips would be helpful but thank you for the video as well

Hey K30Krazy, Great Video.. I had the same issue and took care of that. I don't know where these lines are hooked up to. I still have the same 3 way plastic tee line that you have with the green marks on it going down the driver's side and the line that disappears towards the engine block. I'm still hearing a hissing sound on the open t line nipple. Thanks if you can help out. I just replaced distributor cap and rotor this morning..! Thanks

The 98+ vacuum can in thd fenders ONLY job is to provide backup vacuum under HEAVY ACCELERATION to the HVAC. It literally had ZERO to do with your 4x4. I'm on truck #7 over the past 30+ years and I know them well enough to 100% believe that your 4wd started miraculously working better after randomly jostling the lines around lol. But the facts in this case is you solved a weakened HVAC control actuators mainly blendoor functionality. But with an S-Series?? Tire pressure low and your passenger window gets stuck lol. These are finicky animals for sure! Glad you got your 4x4 going again- that's the only thing that matters. Just don't want some 20 something kid seeing this and believe it's going to solve his shorted out TC motor. It's an hvac line, that's it

How did you get the hose in place, I can't get my hand down so I can push it in place. Did you unscrew the abs pump?

You didn't happen to have a P0300 code when that line was disconnected did you? I had a 97 that I couldn't get to run right. When I parted it out I found a vacuum line diwn by the transfer case was disconnected. I suspect that was the cause of my P0300 problem. By the time I found that, it was too late to fix it. Id already sold parts and cut wiring and all that. I was annoyed. Also, on the late 90s blazers (96-99ish),the vacuum canister you speak of is mounted to the bottom of the hood, in close proximity to where yours is in the fender.

I just bought a 98 ZR2 and dealing with the same thing. Thank you for this video it’s very helpful!!

I knew that if I looked long enough and hard enough, I would find the answer to my question "Where in the he** does this hose go?". Thank you very much. I found the connection and connected the hose in 5 minutes.

U don't kno how long I've looked for that ....

Man I wished u would have showed ware that line goes on the other side of the white connector. I can’t figure it out for nothing.

Rename the video I searched for this forever and it only just randomly crossed my feed name the vehicle and what your fixing

Dude get to the point!!

Dude get to the point ffs

It was only a mystery to you!

Great research dude keep up the good work and yes thats a hidden hard to locate vac hose port COMENT From (Eliama&i Songs on youtube) One Blood One Vine, Love is Much more, Sound of Sadness, Dudo Gulpe ! Share and coment !