How to Diagnose and Repair Chevy Blazer and GMC Jimmy 4WD \ 4x4 Issues

[@nogripes]

Replacement S10 \ Blazer 4WD front differential actuator: amzn.to/2Ems7Db Replacement transfer case vacuum switch can be found here: amzn.to/2EgB7x4

[@allenreid8880]

I replaced those parts but still have hopping in the front

[@darcysw]

I have a 2005 Jimmy and just spend a lot of money with a mechanic to fix my transfer case issues. Now we got 6 inches of snow and ice and I was stuck with my 4wd not engaging. I found your video, was actually able to see this was not engaging and although I was not able to repair it where I was, it allowed me to basically block it into place and get me going. 11 years after you posted this, THANK YOU!!

[@elidames6889]

You know a genuine mechanic when they tell you the about the tools, and hazards, first. They explain how parts work before they explain the problem. As a guy that likes to fix his own vehicles, I sincerely appreciate these types of mechanics. Down to earth, save you money, mechanics.

[@shawndinterman2219]

thanks alot for this video, the dealer wanted $400+ to fix it and your 7 min video and a half inch socket fixed it, I also disconnected the computer for a few min but either way the thing under the battery needed switched so thanks again bud it was very much appreciated

[@kevinc1851]

I replaced 4 of those vacuum switches in 4 years. I finally diagnosed the root cause on friends hoist. We traced the 3 vacuum lines, one was a vent that went up near right headlight. The factory sliced the hose installing the battery tray and the slice allowed contamination to get to the switch and it ceased up. I cut the hose below the slice and put the filter end back on. No issues for the next 15 years.

[@JackstandJohnny]

Dude I dont even own an S-10/Blazer/Jimmy/S-15 but I watched this because my parents have one and these trucks are so common that I know at some point I might end up aquiring one and needing to repair this. Top notch. I subscribed to you a long while back and just found your channel again. Kudos. Thanks for the great explaination.

[@snowboard13gcuz]

awesome! few hours ago was on my way to go bowling while there is about 6 inches of fresh snow in the road, make it outta the driveway in 2wd go to pop it in 4wd think its engaged.. no no. end up gettin stuck. gotta go diagnose this tomorrow morning and this video helped a ton because i had no idea how it worked or what could go wrong Thanks!

[@EduardoMartinez-fb4hr]

Thank you! my 4x4 was acting up on my plow truck in the middle of a snow storm i manually pulled the wire and sent it. got the job done saved me a lot of money.

[@brianw612]

On my 2002 blazer, I was able to remove the drivers headlight and look through a hole beneath the battery tray to see if the vac module was functioning with engine running and battery in. Headlight removes with no tools, just two L brackets to pull up.

[@Sconda75]

Hey brother. Just wanted to say thank you. After watching your video and repeating your process on my truck it now works flawlessly

[@dalenolden1875]

Great explanation, what other issue do I need to look at to engage the 4W LOW?

[@my1after909]

I've just sort of reverse inherited a 2000 Jimmy, from my son, and have high hopes for my future relationship with the vehicle. When looking for gas sending unit replacement info, your videos were the 1st I found. Great video work! Excellent camera angles. I'm pleased to find that there is so much info about this vehicle available online. Seems to speak to what a great vehicle they are. Thanks for all your input!

[@ericnealsr9258]

My front differential is not engaging. one of the comments listed describes the transfer case oil coming back through the vacuum. Three years ago thatto my truck did this and filled my heater switches and all my vacuum lines with transmission fluid...it was caused by a transfer case seal between the transmission and transfer case had failed thus allowing transmission fluid to fill my vacuum lines. I had to have an expensive repair behind my dash to get my heater controls operational again Now three years later. My vacuum appears to be an issue on this front differential issue.. Thank you for this. It gave me a cause and an affect for my particular problem. I'll bet that little vacuum switch has been filled with oil also. ✌️😎

[@KC0NDR]

I now can start to diagnose my problems on a 2000 Chevrolet Blazer. When it does not engage into 4x4 auto, high, or low the light just blinks in cold weather. But in warm weather it will engage with in 15 seconds and the light will stay on solid. Now I can test it and see what it is. Thank You for this informative video!!!!! Roger

[@dandahermitseals5582]

Good presentation. I have resolved all this. My prob is the neutral switch not allowing cranking. Thanks. Dandahermit

[@drz4000]

I had same problem with mine, 1999 GMC Jimmy. Pressing 4hi or 4lo and indicator lights would blink but never lock. I have the 4 button unit so the 4x4 vacuum solenoid is on the firewall and easily accessible. Rather then pulling the battery I just pulled the vac line from solenoid that goes down to axle actuator. No vac present when pressing 4Hi, next I pulled the vac source line on the solenoid, still no vac. Traced it back to the Tee fitting on driver side. Pulled the Vac feed line going to manifold at Tee, no vac. Turns out I had a 1" gaping crack in the vac source line! Easy 15 minute, $2 fix. As a bonus my idle is much smoother too! Thanks for the video!

[@KITT089]

Going to check this system in my blazer in the morning. My 4WD engages just slowly. The little valve you mentioned, is that somewhat of a challenge to change?

[@americangigolo598]

Its August 18 2020. Just bought a GMC jimmy 2000 FOR $1000 dollars with 185000 miles . This truck is in great condition. Only problem was da 4×4 was not engaging saw you video man this truck its in BITCHING PERFECT conditions thank you saw much... best deal of my life

[@linklinks4454]

Thanks for the video i have a 2003 blazer that the 4x4 quit working once i removed the battery and the plate i saw the actuator was bad replaced and ready to go.Thanks again and keep up the good work.

[@gmcjimmy3580]

Thank you so much for your video on the blazer and gmc 4 wheel drive trouble shooting, I have a 98 Jimmy and the vacuum hose got next to the exhaust manifold and burned in half. Sorry to ramble but god bless you are the man. If you don't already you should have your own shop.peace and have an awesome day.

[@murraypirt6149]

This helped me fix my 1997 4dr 4x4 blazer. It was a sticking cable going from the vacuum actuator under the battery to the front gearbox.. dripped some lube into the end of the cable and worked it a few times, then the vacuum actuator could pull the cable out again. 4x4 is working now...yahooo... thanks

[@toddpf]

How in the hell did this design ever get approved for production? Is this supposed to be better than the 4x4 lever of the old days? So sad!

[@jamiel3504]

I miss the in and out Warren locking hubs, they never failed me.

[@PitPwny]

It the same people that designed the Spider injection assembly. I’m really left scratching my head on these trucks, a lot.

[@maxjones9139]

@@PitPwnyas bad as those spider injectors can be, they can also run for a long time. I think if they’re used every day they will last longer. In my experience anyway.

[@jimandjessicacrisp]

Hey Mark, great how to. I've been through mine and still having issue. Replaced dashboard switch, replaced cable and actuator. For a while it was working. However then I started getting back pressure and trans fluid pushing out my vacume lines and back into the actuator which degraded the rubber and popped two of them. As near as I could tell vacume switch failed and allowed trans fluid to somehow be moved past. Replaced Switch now, but dash has yellow 2wd light on, and no motor click no 4wd?

[@jamesbradley1601]

just wanted to let you know that I have a 2000 chevy blazer and this Video was helpful for me finding the reason that it wouldn't get over 5 mph. it was the piece that the electronic wires plug into for the 4 wheel drive, that makes the 4 wheel drive work. thank you for your video.

[@OPHBuffett]

One of the best diagnostic videos I've seen. And, unfortunately, I've had to watch a lot of them. Subscribed, and keep up the good work.

[@johnpanchuk3997]

Excellent video. Good camera shots and clear, knowledgable explaination. Better than most service information commercially produced out there. Walking out the door now to fix the problem on my neighbors Jimmy. Thank you!

[@filiprx2]

Thanks for the video! will check it out tommrow! Mine is stuck in 4wd! chould it be the same problem?

[@MrJoeruben]

Had a question is there a spring that returns it to 2wd position? Mine locks in ok but wont unlock for about 50 miles and i tried back and forth tricks

[@thomastremblay4243]

Hi Mark. Thanks for this video. My Jimmy's transfert case is stuck in the 4WD position. Before I try this diagnose process on my vehicule, do you think it could be the same problem that the one you're talking about in the video?

[@tylerb137]

You did a good job on this video mark! Just wanted to let you know

[@tonyburke8441]

Would that $15 valve cause your four wheel drive to parsley engage because that's what mine's doing partially engaging when I'm driving

[@fthsjam93]

Did you ever figure this out?

[@kodibogart6234]

Hey Mark, So i finally got around to fixing the 4x4 it was the valve, it was stuck. Now my 4x4 wont stop blowing fuses... every time i drive around for 5-10mins the lights go out on the 4x4 and the fuse is blown... everything engages fine at first and the actuator is working good! Any thoughts on whats going on ?

[@Ricky-uq4kb]

1998 Blazer Mark, the transfer case clunks when I go from 4h to 4l. It clacks about 3 times when I try to go to 2h, but does not change. Does the transfer case have to full of oil? I have vacuum at the actuator, it tries to pull but the cable is stuck in the diff. I got it to go into 2h 1 time, but when I changed back to 4wd it wouldn't change into 2wd. Possibly encoder motor weak? Works good going from 4wdh to 4wdl. Thanks for all your help so far.

[@Jacksonransom]

Thanks for the video. My blazer 4wd would only work on occasion, and it was very slow shifting between 2 and 4. I took the actuator out and it was full of transmission fluid. Turns out a shaft seal was leaking ATF from the trans to the transfer case, overfilling the transfer case. The vacuum would than suck up the ATF into the actuator. Quick fix was to change fluid on transfer case, permanent fix was to pull the transfer case, and replace the seals between the transmission and the transfer case.

[@jtatetheballer]

ALL Blazer drivers, I drive a 2000 blazer LT... My 4x4 would shift but not lock and the light would blink much like many of yours did. I never did find the vacuum switch on top of the transfer case and was told my model of blazer did not have one. But what I did do was take out the battery and pan like this video showed. I unplugged the hose from the actuator after disassembling the bracket from the body and checked the hose to make sure it had vacuum. My vacuum hose had been rotted so that

[@charlieroberson9184]

The video help me today. Found my vacuum leak at the TEE about a foot in front of the actuator.

[@jamiesarkisian9769]

great video. I pulled on the cable when the car was in drive and up on blocks. The 4wd switch was pushed in 4wd HI. The front wheels did not spin and the lights inside flash. I would like to see the 4wd work before I fix any vacuum leak or replace the cable. Also can not find the switch on the transfer case even after watching your video on it. I would think pulling the cable should get it in 4wd. Would having it in neutral make a difference ?

[@rayramos5660]

Hey Mark I press the auto four wheel drive button, starts to flash and don't hear no audible and or physical engagement and it goes into lighting up the two hi button. I press the four low, flashes a couple of times and audible and physical engagement is heard and felt, same with four hi. when taking off from these modes to two hi, and i start to drive off, trans shifts normaly but vehicle feels like it's in four wheel drive. Just recently started with this problem. Once weather starts to get a little warmer, i'll check out the procedures you mentioned in your video. Any help would be greatly appreciated. God Bless and thanx.

[@jondavis2206]

As I was saying. Battery acid is always good for any important automotive function. They need to design the braking system under a battery next.

[@jongasparetto358]

Great video, I used this video to check my cable but mine is not engaging. I going to check the vacuum hoses, do you have a diagram of all the vacuum hoses or can you tell me where they are? Thx

[@69CamaroChuck]

Thanks for the helpful info. I have an 01 Blazer, 4 button 4x4 controls. The transfer case either doesn't want to engage, or it gets stuck in 4 lo. I haven't checked the vacuum actuator yet, but isn't the actuator told to engage the axle only once the transfer case is in 4x4? Basically, if the vacuum actuator isn't working, is that going to prevent the transfer case from locking in?

[@ralphbloodworthjr2240]

cant believe you took battery out with it running.very brave..i work at an auto electrical shop and just beware that at the time of you removing cables with it running it will spike the alternator and usually kill the computor. so just be carefull!

[@danfleenor5090]

Great video got a question thou my 88 s10 will not go into 4Lo the shifter has a button on it but will not move freely and it doesn't want to stay in 4hi I going to look at the this part from the video but if that work what should I do next I Have already been under it and seen the linkage move but I really don't where to look next so advice would greatly be appreciated

[@stacytapley4336]

When I investigated my vacuum acuator was stuck in. I then pulled the vacuum line and it popped back out. I have watched your video and understand that it is more then likely the vale on the TF case. My question to you is....can iIjust leave the line off the acuator until i replace the valve.??? And if so should I plug the vacuumline temporaily???

[@brian79Z]

Good evening... 2000 Blazer. 3 button 4wd. 2wd Clicking noise from right front that increases and decreases with truck speed. Noise initially started during an hour long drive in 2wd. No noise in reverse. Noise goes away in 4wd. Appears to be locking fine into 4wd. Sounds like a very light partial engagement gear clashing noise. I'm thinking that the Vac actuator is not fully releasing - maybe due to a sticky cable? Or maybe it is at the other end of the cable at the axle? Thoughts?

[@1985kenworth1]

Thanks for the video i will try this..this is the first video by you i have watched and you speak very well in terms that anybody can understand you.

[@xtremearcher13]

Your video has helped me a lot but I still have the 4 wheel blinking light issue and no 4 wheel drive. Now when I squeeze the rubber diaphragm I can hear air coming out near the vacuum actuator solenoid. Is this normal or is it a leak and it needs to be replaced? Thanks, Chad

[@roffus420]

Your videos are very helpful. I have a 2000 Chevy S10 4x4, and one day the passenger front tire started making a noise that sounded like hard plastic rubbing the tire tread. I got out and looked but nothing. I had a mechanic look at it and he said it was the actuator and control gone bad and it was letting the 4 wheel drive slightly wanting to engage. Another mechanic said there was nothing wrong with it and that is must be something else. It does engage into 4 hi and 4 lo. this noise also will come and go. it did it for 100 miles trying to get home, but the next morning it didn't make any noise at all. Please, can you help me? Thanks.

[@roffus420]

3 buttons

[@getreal4883]

My sons is doing the same thing now what was the problem.

[@ntmd8or]

Great video. My problem is electronic as I have no lights on my dash control unit. I have checked the fuses and they are fine. I have heard that there is a problem with some of the switches. I have fire going to the center wire on the 3 wire plug to the switch so I can assume everything is good to that point. The other (8 wire) plug has no power coming to it with the switch removed from the dash. Any suggestions before I buy a new switch? My cruise control is also not working and the fuse is also good on it. I would appreciate any help you can give me.

[@buddynewell9578]

mark love video.lot of info.....just a quick question for you.mine tries to well what seams to be trying to engage.this is what happens. the front tires try to lock up and drag real bad and lock up then go back to draging real bad.then when i disengage it,it makes a loud thump on the underside. like the axel or something just smacked the bottom of the car.after that it goes right back in to two high no prblems. i have tryed to do this a couple times in a row thinking maybe something was froze up and would brake free but no luck.if you have any thoughts on this i would love to hear them.thanks again

[@hunterlutz9582]

Hi mark i have a blazer and 4wd engages the transfer case works the front drive shaft spins but the front wheels dont spin

[@Yenko1992]

a BIG thanks for this video....gonna try this stuff first before a transfer case replacement!!!!! I had no idea were to start

[@fireflies2369]

I wish i would've found this video before my dad decided to take my jimmy and take it to the shop and have the transfer case replaced...

[@franb56]

Great Video! It helped me a lot. Now I pulled the battery and when I start the truck in 2wd. the actuator is actually engaged. But I have no power to front wheels. When I turn it on 4wd it is still engaged and no power to front wheels. Any suggestions on where to go now.

[@franb56]

Thanks for the response. The cable moves freely. I do not hear any noise from front end under normal conditions. I hear it engage when I hit the button, but that is only noise I have heard. I will look into transfer case valve.

[@franb56]

+Mark Jenkins I pulled the switch and it was stuck! So I replaced it, but still no power to front wheels. :( Thanks for all the help though

[@franb56]

Thanks for your help! I don't have the ability to do that. I hate it, but I guess I get to go to a repair shop. Great videos though. Keep it up.

[@freakinowned]

When you do that cable kit to override switch can you still go into 4 low

[@Toasty70CS]

Not only can you go 4wd low, but because you can manually disengage the front differential, you can go 2wd low.

[@Mr4tunehunter]

u never mentioned at any time what the symptoms were that caused the 4x4 problems, On my 2001 blazer I have a blinking light when I engage the 4x4 hi or lo or all wheel dr. would this be the same issue related or should I be looking elsewhere?

[@Drivingcattube]

1998 Blazer 4wd - Sometimes when going down the highway get a loud grinding noise. I can slow or come to a stop, engage 4wd and then disengage, would be ok. Sometimes ok for a while (days/weeks), sometimes will do it again in 30 minutes...would it be the vacuum valve that you talked about near the end of the video??

[@Drivingcattube]

@@nogripes I'm going to try to replace the transfer case vacuum switch and see what that does.

[@scarakus]

i'm gonna tear into the actuator & cable today, i'm pretty sure the cable is seized, and going to need to be replaced. i haven't started on it yet, still too dark out, just mentally prepping... any suggestions on detaching the cable from underneath? am i'm i gonna run into problems, or snags? are there any tricks?

[@daveschidlmeier6425]

What if you have a leaking seal between the transfer case and transmission and fills the transfer case with transmission fluid. Would that cause the 4WD to not work? Would changing that valve make a diffrence?

[@jasondove6092]

The vid really helped. Changed the diafram and the switch on the transfer case thats all working properly now , But it is still not engaging into four wheel drive. Any idea's? Thanks

[@jasondove6092]

No i can't hear anything. It's my friends s10 and it has duel exhaust can't hear much.

[@BoobyMcDoogle]

I'm just hoping it isn't a transfer case issue, because I've gotten it to make some nasty grinding sounds when messing around with it to try and get it into 2hi. The lever on the transfer case is now in the 2hi position, but it is stuck in 4hi. I figure even if the hubs were still locked, the transfer case wouldn't be engaging the front driveshaft, so it would be in 2hi. Alternatively, can you recommend a high explosive for destroying this truck? TIA

[@desgreen1481]

Hi mark, About two months ago my '99 blazer got stuck in 4Lo and is now only 2WD. If I were to change the actuator would it help

[@geraldhinson]

Good video. One suggestion for a possible follow-on would be to show where that part goes on the transfer case for those unaware. of course they can just follow the hose back there too. Btw, fun to see the shared interests (I'm rebuilding a 91 s10, have built guitar amps in the past and making my living in software).

[@geraldhinson]

+Mark Jenkins Ah, I see the (i) up in the top corner on my laptop, but not on my android phone which is where I watched it originally. No matter. The video was great regardless. All of yours I've seen so far are top notch. Subscribed and enjoying. Oh, and thanks for the link in your reply. Blessings.

[@geraldhinson]

+Mark Jenkins Btw, I'm changing out the CV Axle in the 91 s10 (4.3L 4wd) that I picked up used. I have the 6 inner bolts out and am trying to get it unstuck... Any suggestions? I think they are supposed to just pull out but this one sure isn't. :) UPDATE: never mind. I got it. Just had to be a bit crankier than it. ;)

[@thomasdenis6240]

Hey whats the after market kit u mentioned at the. End of the video that makes it to manually engage... I have no vacuum what so ever

[@bradlee6200]

I bought a Sonoma 4x4 the front axles are not there. So you think it probably locked up on them? Where would you start to figure it out

[@marygue3183]

Hi, I have a 1999 Blazer 4 wheel drive. I am getting ready to replace the 3-2 shifting sensor and the trans wiring harness, could you tell me what steps I need to take in order to do this. Am I going to have to drop the trans?

[@donaldtesterman6214]

Mark I have a 2001 blazer n it seems to go in and out of 4 wheel to 2 wheel fine ..my problem is it makes a loud noise in passenger front end only when moving forward...it sounds like riding on rumble strips at high speed ...when I begin to slow the noise gets louder which I am sure is caused by braking...when I start out and the weight is more on rear of vehicle the noise quits but as soon as weight is distributed evenly again the noise returns...could it be the actuator ? and add the fact the blazer sat still for over a year

[@812williams]

Hey Mark. What would keep me from just hooking up a cable where the Actuator hooks up? Dont want to spend over 100 bucks for the cable.

[@MrGohe310181hdg]

Hello Mark. I have a '95 Jimmy and from a year ago to stop working today 4X4, since pressing the button 4HI or 4lo not heard of anything in the transfer, the lights and the module paraprean few clicks are heard but back to 2hi before replacement on the trasfer case motor and would like your suggestion if I could you tell where I find a diagram for vacuum hoses and connect them as the trasfer case vacuum switch

[@kodibogart5644]

Hello Mark, I have a 2000 jimmy and I'm having some problems. I believe my jimmy is trying to engage or disengage from and too 4x4 while I'm driving but not all the time. i found your video very helpful and have noticed that my diaphram is stuck in and it has no play at all. I took a video while I switch from 2x2 to 4x4 I can hear a noise trying to switch but there is no movement of the diaphragm and cable. I think it could be the valve?

[@kodibogart5644]

***** Thanks for the reply.. Yes I believe you are right the 4x4 fuse is now blown so it hasn't been doing it all the time now. There is no vacuum at the actuator nor is there play in the line I believe my truck is actually stuck in 4x4 even though the light would say 2x2.. unfortunately nothing is open in my area today so I will have to do some more trouble shooting tomorrow. I figured I will buy a new valve anyways to see.

[@withking2692]

Kodi Bogart mmm. k

[@Jason_Phillips3679]

Kodi Bogart my 2000 GMC Jimmy has trouble sometimes with the 4x4 system

[@evelynnveleni]

I wonder if this is the basic idea across most 4x4 systems. I have a 2001 Toyota Sequoia and the 4x4 is not engaging. I do hear something clicking after pressing on the 4x4 button, so I suppose the fuse/electical is working?

[@alientrade]

Hi Mark,I took the vacuum pull out from under the battery on my 1998 S10. I pulled the cable out and clamped it with vise grips. Front axle still won't engage. Could it be a bad motor that engages the front axle? This would be the part that rotates the rod sticking out of the front axle housing. Also, can I take this motor assembly off, and rotate the rod by hand?Thanks sincerely,Barry

[@joshuadurand]

Thanks for the video Mark. A question if you have time. I have a 1999 Blazer. Yesterday I got stuck in the mud. Hit the 4 hi button, sounded like the front wheels engaged, but they weren't turning. Tried 4 lo, and the same thing. It sounded like the wheels engaged, but no pull from the front wheels. I went between 2 hi, 4 hi, and 4 lo a few times and nada. Finally, I hit the Auto 4WD, and bam! The front wheels finally started pulling. I got out of the mud and got back on the road. Then I hit 2 hi, and suddenly I didn't have anything. I was in Drive, but nothing was moving. Hit Auto 4WD again, and started moving, and then finally hit 2 hi and everything seemed back to normal. I have no idea why Auto 4WD woould work and engage, but 4 hi and 4 lo wouldn't. Thanks in advance if you have time to reply.

[@ironman050284]

Hi Mark. I have a 2003 Checy Tralblazer. I just picked it up a couple weeks ago and found that y 4x4 isnt working. When I turn the knob to awd, 4hi or 4lo, I hear 2 motors under the vehicle engaging, and the light on the knob goes solid. However, my front wheel dont seem to be engaging. Does the system in this video apply to my vehicle as well? Or do I have a different type of actuator I should look at? Thank you

[@tylerhicken7868]

i have a 2003 blazer. i used the 4x4 and now it will not come out. i watched your video and checked the actuator that is working. i also replaced the transfer case switch. the only way to get it to release is to disconect a vaccum hose from the t fitting on the driver side right under hood. i was wondering if you have any other ideas for me on how to get this issue fixed thanks. tyler

[@anthonygambale1954]

Hello Mark, hopefully can help me. I have a 2000 Chevy Blazer 4 button system. All the lights on the button were off so I replaced the button switch itself, to no avail. The TCC module in the right kick panel had a lot of crust and corrosion. So I replaced it. Now the lights on the 2w HI light is lit, and my service four-wheel-drive light is off. I checked the diaphragm underneath the battery By applying manual vacuum. The diaphragm will hold the cable back so the cable moves freely. When I push either 4w Hi ol low the light will blink, the cable will draw for five seconds or so, then it will default back to 2 Wheel Dr. If I do this for more than two or three times all the lights on the dash go out and service four-wheel-drive light will come on, until I turn the ignition off and on again. This for the drive was working normally last fear. I don't know if I need to change the motor on the transfer case or the solenoid on the Dashboard.

[@roadstar499]

what year trucks are setup with this setup?I have a 2004 gmc 1500...pretty sure this is different than my 4w drive. ...thanks

[@jasbell0531]

Mark I first want to say thanks for the videos and a question... i have a 93 s10 will not disengage 4wd. im replacing the vacuum switch ..is it critical that each of the 3 lines go back to same location on the switch?

[@andrewstartek8910]

I'm glad you made this video my jimmy was making this weird noise I have never heard before in 30 years of screwing around with cars cable was fucked thank man

[@richardbennett3705]

do you have a link on where to purchase the kit to replace to a manuel opperation? Thanks for your post very helpful!

[@lynnmusser2562]

hey just bought a 97 Jimmy five days ago....today it started making a noise in 2 wheel drive, almost like it was in 4 wheel drive when I would slow down at a stop sign it would make a roaring sound like big tires make....put it in 4 wheel drive and it stopped doing it.Could u please give me your advice on this? Thanks in advance

[@MrTarkus007]

what year is this model cause i had problems with mine i have a 90 silverado where my shifter was completly stuck so went to see my mechanic &he fixed it he said the shifter was full of rust it was seized &2 mine doesn't have that vacuum i took out my battery tray looking for it but don't have it . so anyway all it costed me was 20.bucks man was i glad...

[@stephenstone8027]

Is that the same valve you described in the video?

[@brad300ZXS16]

My '98 is actually stuck in 4hi. I have unplugged the vacuum to engage the front end to free it up but the module is still stuck inward in the 4hi position. I am assuming my cable is jammed.

[@zackc9923]

Hi Mark, would a bad vacuum line cause issues where no lights are on next to 2 lo, 4 hi, 4 lo? If I put the Blazer in neutral then I can press one of the buttons, seems to engage the 4wd, but only from neutral. Tried replacing the transfer case, didnt help. Thanks!

[@stevenkmckendallsr1169]

Would you please kindly do a video on replacing a 1996 GMC Jimmy SLE (4 door), driver's door latch. Thank you.

[@thomasrainwater9746]

Hey Mark. 02 s-10. The low will kick in, but the high won't. All the lights are working on the dash switches. Any idea where to check with this issue?

[@ethanboof]

had problems with my 4x4 before. this time the button switch on my dash is not lit up anymore, cant even engage my 4x4 to see what the issues is. Any help or advice would be greatly appreciated.

[@dunaweezel]

thanks for the vid. question tho. since the actuator is only point a to b, and not abc. how does the 4x4 hi/lo work

[@ricdiamondhandsflair7208]

Awesome video! I want to buy a S-10 Blazer just so I can put this knowledge to use . Thank you!

[@timothyanderson8741]

Yeah ran the code got maf sensor and mutiple misfire I usually always get the multiple misfire its been on since I owned the truck so I never worried about that I put a remaned maf sensor still does so I guess I gotta pull the plugs and check them let me know if you come up with any ideas cuz im running out

[@alexhardin2164]

You talked about an after market 4x4 transfer case cable kit where can I find one of these?

[@gageihm52]

Great video, but it 's not helping me with my problem. I have a 99 Jimmy that won't go into 4 Hi. 4 low works and when going into 4 hi from 4 low, it defaults to 2 hi. If my 4 low is working, doesn't that mean that the front actuator, cable and differential is working fine? Could I have just a bad vacuum switch at the TC or is the encoder motor acting up? module bad. This was working at the beginning of winter, but the second time we went to use it, it wouldn't work. Any help would be appreciate

[@susanquickel7642]

mark great video i have a 2004 chevy s10 4x4 crewcab as soon as i start the truck the accuater will suck in an the truck is in 2wd. the truck makes a noise when driving sometimes in 2wd an when i push 4wd button it stops

[@insanechevy91]

To get the truck back into 2wd what do you think needs fixed the actuator I can hear making a noise like its trying to but just dosent have enough power maybe

[@jademims3764]

What size gear does the 92 Jimmy blazer 4×4 carry in the rear

[@ZaPowzer]

My 2000 chevy blazers 4x4 electronic transfer case, both the 4hi and 4low lights stay on, any thoughts? the actuator is fine and the switch seems to be good and theres no vacuum leaks, so would be the electronic transfer case module?

[@ZlosGuap]

Hi mark not sure if you can help me out. my question i have 01 Chevy blazer zr2 that is stuck in 4hi. I can get it into 4lo but not into 2hi. I already replaced the solenoid motor that goes on the transfer case and no luck. Thanks in advance

[@derekrecollet8451]

I have a 2002 Jimmy, and my problem is the 4x4 won't switch back into 2wd. I replaced that little 4x4 transfer case vacuum switch because it was siezed, thinking that was it, but then someone told me it was just for the lights on the dash switch..but i replaced it anyways. Next i looked around some more and found my cable to the front diff. case that goes from the vacuum actuator to be siezed, i tried to free it up but then it just ended up breaking, so i replaced it, but that still did not solve my problem. Any ideas on where to look or what to replace next? Some are saying the encoder motor on the transfer case, and also found some are saying the TCCM, Should I replace those?

[@nickroberts2503]

i recently replaced my vacuum switch thats on top of the transfer case but it is still not getting any vacuum do you have any suggestions

[@dpatt45]

Very interesting but, I put my 2001 Jimmy into 4WD it would not move forward or backwards and wouldn’t go back into 2WD. Also makes a grinding noise if I try putting it into park with the motor running. Any help gratefully appreciated, I am at a loss.