Chevrolet Blazer, GMC and S10 Four-Wheel Drive Repair, Complete Vacuum Hose Routing and Replacement

[@nedaCFilms]

This fella needs his own show! Hahaha, he’s great!

[@MrAamstrom]

Thank you for watching and for the encouraging words.

[@clintonsmith4059]

U sure have a way of explaining things.... very comprehensible

[@davidholland6061]

Day job and shot 22 minutes thanks for your time. This video saved my blazer from sitting untill I could pay someone to fix it. Took me a little longer than a day ok ok took me 2 days and a box of bandaids but I did it 🤓

[@angiereyes5893]

I've been wondering how I'm going to fix my vacuum lines on my 2001 4×4 Chevrolet S-10. Now with our help I'm confident I can do myself. Thank you Allen.

[@claaansey1608]

just found this video now, youre super good at explaining and visuals, saved me a lot of time. thanks

[@worshipwhilewewait]

EXCELLENT! Gotta love a guy that shows everything! Great job!

[@MrAamstrom]

Glad you enjoyed the video and my attempt to cover all aspects of the repair.

[@joseromero5994]

O

[@daganhaddad]

appreciate people like you that make these vids - we had 6'' of snow last week & I got stuck before I could even start plowing - taking blazer to a buddy who's learning as he goes w/this job ...didn't realize this system ran off of vacuum - I also notice a few people bypassing it all together & going w/a manual cable - all I know is I hope he can get it done soon

[@MrAamstrom]

Indeed, the vacuum system was crude on these vehicles. In theory, by the late 1990s, General Motors should have had the technology to have used all electronic components but chose not to most likely to save money. I hope you were able to repair your Blazer. Thanks for watching.

[@gman3747]

OMG Thank you sooo very much. To be honest in the first 3 minutes i thought hmm this guy is probably only going to show me the line that goes under the fender ugh not another one. We get it it goes under fender what about the rest of it ?. benefit of the doubt i kept watching. Thank the stars i did this is the most explanatory and visually shown video on the internet about these lines . Simply amazing instructional video . been struggling with this for weeks now but keep getting hoses in wrong spots and cant start engine. You are a great video mechanic maker. Thorough and showing all aspects of the system even the parts as you said that were good you still replaced and showed how to where all others skip right over stuff like that when sometimes that is someones exact problem. Very well done i will be checking for more vids and subscribing. ty ty ty .

[@MrAamstrom]

I am happy to know the video was helpful. Indeed, I try showing all steps in my repair videos, although it is sometimes difficult to record videos underneath vehicles. Thank you for subscribing.

[@kennruckey]

EXCELLENT!!! This is a God Send! New to me Sonoma and a LOT of the lines are rotted or melted out, so I have no way to tell where they come from or goto. THIS video is very concise and pretty much unabridged. It sure will come in handy this week. I've watched it twice already and It's not even boring.

[@JohnnyButtons]

Haha, this guy is great! He needs to be on MotorTrend TV channel with his own damn show. New subscriber here 😉

[@ulisesortiz3820]

My friend, you explain, like nobody else, you video, saved me, a lot of money, i hope do you understand, I'm don't speak English, thank you a lot, appreciate it

[@StealthyWolfDaddyWerewolf]

Thank you for making this! My project got the lines and connectors wiped out from too many careless technicians. I am rerouting and refreshing mine with motor and trans out. But I knew before I got to this point that it was going to be a time consuming job with the drivetrain in. I also sensed and knew it would be a big mistake not to redo it with the engine out. Very very difficult to find all of these lines and check them with the engine in like you did. Thanks again!

[@ulisesortiz3820]

I'm mexicano, but this señor explain very well, remember me my grandpa, my respect for you Sr.

[@chriscool5589]

Thank You Very Much for posting this video. It was the only information I could locate online that showed and explained this process. It helped me tremendously for a 2001 Blazer that was missing vacuum hoses and a few were installed in the wrong locations

[@MrAamstrom]

I am glad to hear the video helped you out with your Blazer. I agree there is nothing worse than starting with a mess someone else created. At least on mine, the hoses were where they belonged but had worn out with time. Thank you for supporting my KZbin channel.

[@jamesarthur6109]

Thank you for helping us all with this! Very informative!!

[@x-man5056]

That's a hard days work with all that getting up and down. Good job.

[@JohnnyButtons]

You should do a series on S-10 Blazer and pickups.

[@MrAamstrom]

I will be posting another video relating to the Blazer in about two weeks. Thank you for watching.

[@JohnnyButtons]

@@MrAamstrom looking forward bud!

[@gulfmountain]

Great work, we're facing the same job, same vehicle so thanks very much...huge help.

[@randynix9805]

Thanks so much for NOT having music playing as you explain what it is that you are doing. Music videos have their place and should never be related to any tutorial / show and tell video. I Will never understand why anyone thinks it is a good idea to do such.

[@bigdadytid]

Thanks, Alan! I justed picked up a 97 S10 Blazer.

[@REHTWO]

It would really help if you would identify the year of the vehicle. Also there are two different 4wd systems on the blazer/jimmy. One has an auto 4wd bottom on the dash and the other does not. The have completely different vacuum routing and controls. Please identify which one you have. ( it’s the one without the auto 4wd button)

[@beasyphone]

22mm on that vac switch (transfer case) wrench fits, dont bother with a socket. "Dots or paint " is a great idea. The switch has a "key" blank nipple, keep that at 12 o clock, youll be looking at a ln upside down triangle of the 3 nipples. Left goes up to the Y fitting + meets the transmission vent line, they go up onto the furewall to the "vented cap" line thst dead ends there (on furewall by oil fill.. right of the upside diwn triangle goes to the sctuator under the battery, and left goes up to engine vacuum. Thought id add those tidbits. Great video my friend!

[@MrAamstrom]

Thank you for adding the information. One way or another, the transfer case switch location does make the job a little bit of a challenge. Please come back and watch more videos.

[@arthurellisor]

Absolutely an excellent video, very well filmed and explained. Thank you for taking the time to make it and share with us. I'm fixing to replace all mine this weekend, now I know where they are and all go. Thanks again Art

[@revodavid]

Alan is a Godsend

[@XXx-ev8in]

Great job good good video enough information most mechanics don't want to help you with it . After the video i got it done you don't know how much it help thanks

[@javiercastro8802]

Now this is a very helpful video. Thank you for the detailed vid. I'm gonna replace my old vacuum llines, those are cracked and burned. This is why my front diff. wont engage.

[@SuperNova-so2cj]

Thanks Alan! Just what Id been looking for!

[@MrAamstrom]

You are welcome and I appreciate the kind words.

[@glenfenderman]

Good video! I just bought a 2000 Blazer, and I think I'll need to know that stuff.

[@walterlucchetti7591]

Excelente explicación, muy didáctico, thank you For your explanation and dedication !! From Argentina 🇦🇷

[@Jeff-hp3vn]

Hello I am curious as the difference between s10 in your country vs the USA version. If there are any difference? Mine is a 1998 gmc jimmy 4x4

[@robbyddurham1624]

I needed this a few weeks ago, but I still need this. I'm not quite got her done yet. You might have showed me a miss connect also.

[@robbyddurham1624]

I found some vacuum lines unhooked on my dad's blazer and I might have put one in the wrong place.

[@davidadams2250]

Excellent video and very knowledgeable

[@MrAamstrom]

Glad you liked it!

[@wvdiggingroots]

Thank you. Been working on my S10 4x4 for a few weeks. I got it cheep all vacuum line at gone. None to trace. I had all right but I had 9ne missing and it's the vet lines out of case. With a broken c5 c6 it's hard to hold up you head and under then back on top. God bless and have a good day.

[@MrAamstrom]

At least, you do not need to take the time to remove all the old lines. Hopefully, you were able to repair your four-wheel drive. Be careful with your back problems. Thank you for watching.

[@peternakogee8449]

tat helps me I found hole on the lines cut them off then plug them back again. It work but after I stop the engine and restarted it. The light came on again. so tomorrow .I will reset it turn the key off and on five times. thank you Allen.

[@sopaul03]

This is Pablo from Argentina, I have a 1992 S-10 4x4 4.3L V6 Blazer and I have a problem with the 4x4... it is stucked in 4x4 and I can't take it off. I don't see any issue with the hoses and vacuum lines, but the actuator that it is under the battery doen's do anything automatically... if I took off the hose and suck in it it works but it doesn't do anything in the gear... when the engine is off and I press the 4x4 button I hear that a little starter motor that it is on the main gear it turns on... but anything is moving! I checked this great video, but I need my help! thanks

[@hightowerone]

Great video! It's definitely one of those, "ain't nuttn to it but to do it." jobs. I bet you a case of beer and a three legged dog that you can't do it to my stock 1998 GMC Jimmy! Bet. I like the way you marked with the dots. I'm thinking it probably doesn't even matter the order/placement of the 3 hoses. You may have had the same thought but of course I would connect the way you did as well. Again, great video!

[@MrAamstrom]

You got that right! I learned long ago never to say there "ain't nuttin to it" Thank you for watching.

[@suzieq8379]

thank you for showing everything great video just what I was looking for

[@danielmunoz7630]

explanation of vaccum hoses were excellant. so glad i could keep up with you explanation, . good job

[@woodcrafter76]

Could you comment on what sizes and how much of each size line you used? Thanks for the video.

[@MrAamstrom]

You will need 3/16, 1/4, and 5/16 inch hose in the repair. The most used is the 3/16 inch hose, and in total, I probably used around eight feet of 3/16. As for the 1/4 inch hose, all the vent hoses utilize the 1/4 inch, and in whole, around eight feet will get the job completed. Finally, you will need a foot of 5/16 for two short sections. One-piece comes directly from the transfer case before it adapts into 1/4 inch hose and one short section where the plastic vent tube exits by the transmission dipstick tube. I used 3/8 instead of 5/16, and it made for a loose fit, but I did not have any 5/16 available the day I worked on the Blazer. I ended up using hose clamps to make the 3/8 inch hose work because I did not feel like driving 20 miles to the store on a Saturday afternoon. I hope this helps you out, and thank you for watching.

[@martinbenjamin6479]

@@MrAamstrom Well now I see that you used 3/16 instead of 5/32, 3/16 being just a hair bigger. 5/32 is what mine is from the transfer case to the tee by the cruise control module. Excellent video. You have now encouraged me to replace them all. All of them have tranny fluid due to the stuck transfer case switch. Thank you!

[@cro75guy81]

Thanks and appreciate the video. 👍👍👍

[@AngelRodriguez-qg3ch]

Very very good explanation

[@johnsteward132]

Good job on the vac lines and the video. Thank you!

[@Darm0100]

hey brother, love the video. did I understand correctly that you replaced everything with 3/16? I had found a diagram that mentioned 4 different sizes but would be way easier to just replace with the same size through out. I plan on tackling this job next weekend, so glad I found this video now. Thank you!

[@damocsell]

Thanks this helped me out a lot.

[@stjohnsriverrat]

Excellent video, I Have a 2002 Chevrolet S10 4x4 pickup. I'm thinking it's probably the same configuration.

[@thriftsndreams6809]

Thank you so much for the video, very helpful. I have to tackle this job. 4x4 not working, lines dry rotted and ripped. Prior owner rigged a bypass from actuator straight to the t for reservoir and vac system. Trying to correctly pick the spots for T connectors and what those goes where now. What year is this vehicle? I have a 2003 s10 4.3 and I do not see the connection of vacuum lines by the reservoir tank. I only see a T connector that holds a line to the engine then a line to the actuator then the line to the vac system. No lines hooked to reservoir port on the fender wall. Do I need to add a 2nd set of lines with a T connector connecting all?

[@thriftsndreams6809]

Mine also doesn't seem the have the one way check valve on the lines

[@MrAamstrom]

The Blazer in the video is a 1998 model year. A few years ago, a friend had a 2000 Blazer, and it also had the same setup. All you should have to do is look and see if you have the vacuum tank. The tank sits flush with the fender, but you can still see the vacuum port. You will need the lines hooked to the reservoir tank or the four-wheel drive will loose vacuum going uphill. I hope this helps you out, and thank you for watching.

[@thriftsndreams6809]

@@MrAamstrom thank you so much I will give it a shot! I do see the vacuum port on the fender wall

[@butchnester1406]

Great video buddy, definitely helped me out. Keep up the good work

[@jorgeguerrero2746]

Excelente explicación

[@albertohernandez8394]

Muchas gracias señor Allen God bless you thank you for making this video

[@waltersteffensthezr2man431]

Excellent video good sir yes the vacuum actuator setup has many flaws that transfer case switch goes bad often especially once you've replaced the OEM one they just don't make things like they used to!

[@MrAamstrom]

I am happy you found the video informative. I agree the four-wheel-drive set up on these vehicles has many flaws. If I were younger and had the parts, I wanted to convert the Blazer to all-wheel drive like the Oldsmobile Bravada. On the other hand, replacing some vacuum hoses took less time and money. Thank you for watching.

[@timdybala7127]

Thanks from western Colorado!

[@franciscoda65]

Justo el video qe necesitaba, good job, greetings from Chile!

[@MrAamstrom]

Glad you found the video useful. Thank you for the kind words.

[@ldproc0]

This is amazing!

[@jonathanrosin1138]

how much of each hose do I need to buy for this repair?

[@mindsablank8061]

Great video.

[@nickp4084]

Awesome video going to do this soon they're super rotted. 4x4 works but I'm having a rough idle issue, can these lines possibly be the culprit or would they just impact 4x4 and hvac?

[@MrAamstrom]

The vacuum lines could very well cause the rough idle. If you still have the rough idle after inspecting and replacing the vacuum lines, I would next check the everyday tune-up items such as spark plugs, wire, distributor cap, and fuel filter. Thank you for watching.

[@ZR2plowboy]

Awesome video! Thank You!

[@mamkiri3667]

Good job

[@DavidsonMott]

What size vacuum hoses will I need? Want to tackle this on my Mom's 97 Blazer.

[@beasyphone]

Also no 3/16th line, vent from tcase is 7/32, ALL OTHER LINES on 4x4/zr2 are 5/32..all of them.. (or 4mm for our northern neighbors lol)

[@cognac8297]

The one from HVAC thru the wire harness thru fire wall is 3/16. And all under the dash. But yeah on the engine and tranny there are no 3/16.

[@MrAamstrom]

Thank you for the clarification of the diameter of the lines.

[@nickc3627]

Could a bad vacuum line keep the vehicle from starting?

[@JuanOrtiz-ej1nf]

THANKS A TON

[@jefferyshepherd628]

Very appreciated man

[@14keanan]

Are all 3 hoses coming from the pcv valve just breathers? Im having trouble figuring out which one is a vacuum line and which ones are vents

[@MrAamstrom]

The hose's that are 3/16 inch are the vacuum lines. The 1/4 inch are the vent hoses. Another way to look at it the main vacuum starts at the engine goes over to the y or t connector and heads to the vacuum canister and back to the transfer case switch. Also the vacuum actuator under the battery tray goes back to the transfer case switch and is supplied with vacuum through the transfer case switch. At the transfer case switch two connections are 3/16 inch and are vacuum and the one 1/4 inch is for the vent.

[@josephc5116]

Allan do these older GMs tend to have these issues

[@MrAamstrom]

Hello, and thank you for your question. Faulty vacuum hoses are not a problem isolated to General Motors but all companies over the years. The rubber deteriorates due to engine heat and oil getting on them from leaking gaskets. That is why most modern vehicles have switched to electronic controls and depend less on vacuum to get the job done. The good news, although vacuum hoses do fail, they are cheap to replace and fix. On the other hand, when electronic components fail, the price to repair will increase.

[@dennyb5509]

Bought a 1999 Chevy blazer from a guy super cheap, $250… The guy tried replacing the vacuum lines not paying attention how the vacuum lines actually went. So it does not go into four-wheel as of now. Some how he has transmission fluid into the motor oil now. All I want this vehicle for is to pull a ice fishing house on a lake. I don’t care if it gets locked in 4x4 and stays. One purpose for this vehicle. So I have two options. Try to re-route the vacuum lines correctly or just install a push,pull, and lock cable. It runs good honestly but vacuum lines are completely messed up. So where did he mess up to cause transmission fluid to enter the motor oil? Any advice would be greatly appreciated.

[@harveywhite6520]

sir there is another line mid way from the transfer not hooked to anything did you see it i have fluid coming from it' on top hard to get to not the vent from transfer , thanks James

[@MrAamstrom]

All the hoses end up hooked to either vacuum or the vent tube. The part of the video where the fluid was running out of the hose occurred after the hose was removed from the transfer case switch.

[@alennx22]

Where are you and what would you charge to replace my vacuum hoses? Thanks in advance :)

[@jakeskarp3838]

Where did you get your vacuum hoses from?

[@russell6031]

good video!!!

[@timdenton7646]

Hey Alan do you know where the vent tube on top of the transmission goes it's on the right side of the top of the transmission

[@mikem5475]

Just run it into the frame

[@ulisesortiz3820]

Can you tell me the sizes hoses, sorry for my English, hope do you understand my cuestión

[@ulisesortiz3820]

I get it, i didn't pay attention to video

[@MrAamstrom]

Thank you for asking and watching. The sizes are 3/16 and 1/4 inches. Glad to see you found the video helpful.

[@ronduck2812]

Good video 📸 thanks just got a jimmy good to know 😂

[@suzieq8379]

well I changed one but I can't hardly get the 5/32 hose on the T so easily advice???

[@MrAamstrom]

Try a little dish soap on the end of the vacuum fitting.

[@suzieq8379]

@@MrAamstrom i thought about taking Q tip and putting vasoline down the hose

[@danmeyer8550]

Bravo

[@crankbait2768]

Great Video !! How lone is the 3/16 hose from the actuator to the transfer case ? How much did that transfer case switch cost?

[@MrAamstrom]

The 3/16 inch hose from the actuator to the transfer case was about six-feet long. The switch cost $19.99 at Auto Zone although I did see conducting a google search the switch for $10.99 at www.carparts.com/details/Chevrolet/Blazer/Replacement/Transfer_Case_Switch/1998/LT/REPC320801.html?TID=gglpla&origin=pla&gclid=Cj0KCQjw6PD3BRDPARIsAN8pHuGLJr5hElAVDKazp6x_HVZ6m3Gyxo7UpMHKh29GWQXMl8-17eoMgqAaAjElEALw_wcB&gclsrc=aw.ds Thank you for watching.

[@TheSparks83]

Simple yet perfectly detailed video, props Alan 👍🏼 well done. Do you think you could take a picture of the vacuum diagram sticker on the driver side of your fan shroud for me when you find a minute? Not sure if hou can post it here, if you are okay with emailing it to me let me know please. Thank you Sir.

[@2stage90]

Nice Old youtube video. Just meat and potatoes.Nice Job!

[@dukree3391]

I have a split in one of vacuum hoses coming from the switch. Not really looking forward to this repair

[@MrAamstrom]

Yeah, it is not the most pleasing job, but at least if you change all of the hoses you will not have too worry about them for years,

[@dukree3391]

@@MrAamstrom still having issues. I have a 1998 GMC Jimmy, 4.3, 3 buttons on the dash (2hi, 4hi, 4lo). When engaged in 4 wheel hi, can't get any power, studders while gaining speed, feels like I'm driving with the brake on, and makes a whining/howling noise. Tried to engage back to 2 wheel, hear the transfer case motor, but wouldn't engage for about 2 miles. Cant seem to figure it out Edit Quote

[@jameseichele1693]

This is what I need to do and not looking forward to it

[@jameseichele1693]

Got it done and now my 4x4 works flawlessly

[@triplecranks]

Arlo Guthrie

[@allenwolford3384]

O

[@davidschultz4254]

Qt h

[@MrAamstrom]

Meyersdale, Pennsylvania

[@JoseSanchez-lo4vc]

Bruh looks like everyone’s drunken uncle