Chevy GMC No 4X4 - Service 4X4 System

In this video I outline possible causes including diagnosis and repair of common issues effecting Chevy, GMC and Cadillac trucks and SUV’s such as Chevy Silverado, Tahoe, GMC Sierra, Yukon, Cadillac Escalade and others with a symptom of no 4X4 operation, the transfer case range switch buttons won’t illuminate and/or there is a service 4X4 message displayed on the drivers information display. This video also contains helpful information for those replacing the transfer case shift (encoder) motor. Watch this video for more information.
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[@TenmaFN]

Believe it or not I actually had my truck serviced in your shop when I was stationed at Ft. Richardson... great guys

[@rasschroeder6143]

We need more mechanics like you. Back in the day when I worked on cars I didn’t want to be a millionaire at all and helped people out.

[@ThecardoctorTV]

You’re a saint.

[@opietaylor7649]

I wish i had you as my mechanic man. Also wish every mechanic had the same integrity and morals as you.

[@ThecardoctorTV]

Thank you!

[@chasbader]

Add that to your top 10 list of reasons to move to Anchorage, Alaska.

[@fredonthecuttzent.8405]

@@ThecardoctorTV how do you get rid of a falty service brake booster light on a 04 tahoe 5.3?

[@82thetots]

@@ThecardoctorTV if my truck was in 2H which way do you move the selector manually on the transfer case to get to the neutral position? I do not own the digital code reader like you do. Appreciate all the help.

[@ThecardoctorTV]

@@82thetots i believe it would be counter clockwise in that case but also you can tell by looking at the splines on the replacement motor and just mirroring it on the transfer case side. I look at the mounting bolt locations to determine the spline clock positioning. Hope this helps. Good luck and thanks for watching my vids.

[@shaffer4220]

You are one in a million helping customers get their vehicles repaired. Love the videos and learned much along the way. Thank you.

[@chasbader]

Tim is an awesome mechanic. He knows exactly what to check- real quick. I did a rear main seal changeout and didn't ensure the wiring harness to the transfer case was properly secured. Just like Tim said in the video, if this harness falls down, it will rub against the driveshaft. In our case, it wore through the insulation. Initially it was an intermittent SERVICE 4WD light but then it was constant. After I shotgunned the selector switch and the front axle actuator, the lights on the selector switch went out. Tim was able to isolate the problem within a few minutes. Found the blown fuse that caused a no comm to transfer case control module code... Then he was able to pull the codes off the transfer case control module... Looking it up in an online database, there were a number of possibilities. The problem became immediately apparent upon inspection of the transfer case. Don't be like Charlie- Watch the video! I highly recommend Doner Automotive in Anchorage, Alaska if you are lucky enough to live here.

[@ethanhale3122]

Matter of fact I do thanks for the recommendation

[@coloredcube1411]

Good video ,what about when all the lights are on the switch I replaced the switch but didn't help ,all lights still on the 2,4 lo,high wheel switch I saw a lot videos but no one has that issue I guess ,any thoughts??

[@jimmyherrera1465]

This man knows what he's doing and he knows what he's talking about I really enjoyed your presentation I don't see how anyone can go wrong having you work on their vehicle thank you

[@TheNucklehead75]

as an "old soul" and american, also veteran, i salute you, you represent the helpful spirit. that i believe ths U.S stands for. thank you! from a persian gulf veteran.

[@ThecardoctorTV]

Thank you for your service!

[@mustangsally5901]

Thank you for your kindness Tim, you will be blessed along with your business.

[@ThecardoctorTV]

We seem to be blessed way beyond what we deserve for sure! Blessings to you as well!

[@jhettish]

Only 152296 miles, it's not broken in yet. In my company I buy used Duramax GMC or Chevy. Usually they have around 120K miles. I tend to pay cash, usually less than 25% of the price of a new truck. My theory is that small businesses like mine have good months and bad months but payments go on and on and on regardless of the bank account. Most often a $700 repair bill (or even higher) is less than a single payment for a new truck. I pay someone else to do the truck work while I keep at my company's job. Some self anointed business-men say it's better to work from borrowed money rather than cash. I prefer to be debt free and drive a 15 year old truck. There are five other people in my company who do our field work and I keep my eye on the trucks they use. After all, the trucks belong to my company. Excellent video.

[@fieldsofomagh]

Thanks for helping out your friend, when his luck ran out. One day the sun will shine again and the clouds will only be a memory. God bless all the good people in Anchorage, Alaska.

[@ThecardoctorTV]

Tom, that's really cool what you said. I agree completely. Blessings to you!

[@roqueortega5286]

Wow I know exactly how he feels. As a mechanic myself sometimes I find myself helping out people that you know are going through hard times. Weather it's towing a car or sometimes fixing it if it's possible. Their gratitude and appreciation is endless.

[@benjaminwrigley6916]

Q

[@darrensoldan5972]

Excellent video! Honest, down to earth, knowledgeable, step by step! Need more mechanics like you Tim!

[@MattBaker-zd8nq]

I seen that light come on this morning service four-wheel-drive. All I could think about was every dollar. I had gone out of the bank to fix it.

[@MattBaker-zd8nq]

I can’t stand all this new shit they put on these trucks what happened to the days when you put it in two higher or four high and then when you’re done you take it out of four-wheel-drive everything‘s just fine no lights no nothing to aggravate the shit out of you

[@seanbreaux897]

GREAT JOB TIM. LOVE YOUR HELPFUL, KNOWLEDGEABLE VIDEOS! BEEN WORKING ON CARS SINCE 1978 AS A MECHANIC, BUT I STILL NEED HELP OCCASSIONALLY.

[@deanbarr5740]

Thanks Tim, that was very helpful. Quite an act of kindness you did as well. More than once I've been in these predicaments. Its very rewarding to be able to help out.

[@ThecardoctorTV]

Right on. It is always better than to receive. Blessings.

[@garyjordan3181]

Thanks for your time to help people with your expertise. @75 percent of the electrical problems can be bad grounds

[@greggfuller2220]

Thank you for sharing your operational expertise. You do a great job. That was really kind of you to offer your service for free. Hard to make a living when you're not charging, though. You are a decent human being!

[@kennithmorella2693]

Thank you sir. Great to meet someone who is always out to help a person in need and short on funding Very nicely done video. Have a great day. Looking forward to your next video

[@ThecardoctorTV]

Thank you, I certainly didn't do the job for free but its very satisfying to help people when we can. Blessings to you!

[@cliffanderson7544]

Need more mechanics like you buddy! Always good to help people out who are on hard times.

[@moosemountainskiboardareaa3615]

I ran out of gas on a steep downhill grade in my 99 Blazer. AAA guy brought me some and said when an older Blazer is below a quarter tank it can stop reaching the gas that flowed forward. It was a 16% grade. By the time I got down to the bottom (no place to stop) I had driven about 3 or 4 miles with no power steering or brakes. It was a relief to be sure. But I had driven up to the ski area in 4WD and by the time I got down the fuse was blown from me trying to start it a few times. So the first thing I checked, as you suggested was that fuse. I put in a new one and it works again...thank you for saving me hundreds at the dealer.

[@Anthony-sd9yz]

outstanding! Rare to see some good guys you can trust. Thank you for sharing.

[@jsharp1776]

Today you earned my subscription to your channel after your showing of compassion for the man that had very little money. God bless you and your family!

[@dlivengood59]

I know just what to look for now, thanks. I have a 2003 Tahoe and a 2003 suburban. This problem must be common among Chevy's of that era. Great job 👍 👍 love your channel!

[@RL-gj5xg]

Thank you, Doc. You always provid great refreshing clean vids with very informative info.

[@donomar6342]

Hey, I watch lots of videos...but when I see one from you about a certain problem yours is always the one I watch. Common sense, right to the point...you have helped me out many many times. Thank you so much for posting your videos...you are much appreciated!!!

[@ThecardoctorTV]

Thank you so much. You made my day.

[@canadiantrucker9574]

At least you have a heart Tim. There are some of these millennials, er new technicians who want to get rich quick with the don't care how attitude. You obviously are not from that generation. By the way that Trailblazer AC pulley bypass belt trick worked spot on for my moms truck. Many thanks for showing us all that

[@ThecardoctorTV]

Thanks man, glad to help!

[@547Rick]

Thanks Tim! Always good to see a GM truck video seeing that I own two of them.

[@ThecardoctorTV]

We seem to have no shortage of them here. Take care

[@SKANK_HUNT49]

@@ThecardoctorTV man,. I just want to say thank you. You're a very good teacher. I remember when I was a kid you had to go to the library for the knowledge or at least have a set of encyclopedias. My kids look at me funny when I try to explain how amazing it is you have all the answers in your pocket

[@spelunkerd]

Good point about that ground. On my 2000 that ground bolt is threaded into sheet steel, easily stripped out. I put a nut on the back so it couldn't move, when diagnosing an ABS code. You also make a good point about the cost of parts. However we who drive old cars save thousands of dollars per year from less depreciation and less insurance compared to newer vehicles! So, we shouldn't complain too much about the cost of parts. New vehicles built today are much more likely to fall apart before their time.

[@ThecardoctorTV]

agreed, so sad we live in such a disposable time. I love these old trucks. Worth fixing for sure.

[@philp.3978]

Your a good guy Tim. It's nice to see people helping those durring rough times.

[@ThecardoctorTV]

Thank you Phil

[@timtaylor7106]

Dorman means do it twice, I understand Tim, you are a great tech with a big heart. We do what we have to for our very loyal customers,this guy will fall on better times and you will have helped

[@ThecardoctorTV]

Agreed, its not like a gave away half my day on something, its just a small gesture to help our customers. I probably get more out of it th=an them anyway but you know how that is im sure. Blessings!

[@heavysnow8616]

Nice to watch a video and actually learn something. Great work Tim, it’s nice to see an honest man making his money the old fashioned way-good hard work! Take care Tim and thanks so much for taking the time to produce the video’s, it’s much appreciated. God Bless my friend.

[@glenharper3136]

Big Man with a Big Heart. Great job Tim.

[@ThecardoctorTV]

Thanks, maybe ill use that as my new motto. haha

[@potterywheel2503]

Awesome thank you! My 4x4 was acting weird and not wanting to switch, you said the ground wire was the first thing to check, that did the trick.

[@ThecardoctorTV]

Very good

[@shawnlamb8271]

Thanks brother. I must have watched 15 videos trying to locate the ID of the fuse to check. All of them said a 30amp fuse named teck, well my Tahoe does not have this fuse so I was frustrated because I couldn't reset my 4wd system without this. Until I came across this video giving me the correct ID and location of the fuse I needed to replace. And I'm finally back on the road again. Many thanks

[@northernminnesotasasquatch2532]

Great video. Your easy to understand and good clear video on what to do!! Thank you

[@wysetech2000]

Well done, Tim. You have a big heart.

[@ThecardoctorTV]

Thank you, its fun being a mechanic!

[@melvinwalker1096]

You are awesome guy. For helping people don't have alot . God bless u sir.

[@josiahcriswell5585]

Hey man, thanks for posting these vids. Was able to save $400 by servicing my ball joints myself.

[@ThecardoctorTV]

I m super glad I was able to help. Thank you for watching my vids.

[@markm5196]

Thanks Tim, my kids don't know how close they came to not having much of a Christmas, Christmas-lite so to speak, because those transfer case motors are not cheap, but I have to have 4WD this time of year, so thankful my problem was the ground wires, even though it didn't look very corroded, cleaned wires and frame rail, now have full functioning 4WD. I appreciate what you do, Thank you Tim, I'm subscribing !

[@brianbrachel4871]

Thank you for helping this man. You help restore my faith in humanity. God Bless you sir!

[@jaybird1851]

We need more mechanics like u for sure. The ones around here charge an arm and leg most of the time or half ass get the job done right. Hell i had one wanna charge me $20 just to drive a car i use to have just to listen to a noise it was making. 🤦🏼‍♂️🤷🏼‍♂️

[@EXOVCDS]

Body still looks clean / solid... so worth putting money into it. A lot of people drive vehicles that are too big / not really needed... or simply don't have the funds to keep up with repairs. It's a wakeup call for some.

[@ThecardoctorTV]

If you ever need a replacement body this is where to look, no rust around here. Sadly they steal these GM trucks of this vintage so you can find any body parts you need on ebay from the crack heads that part them out. I hope this one gets him a few more years of good service.

[@carsomHawkinsyeeyee]

I just fixed my service 4wd light tonight. The 30 amp TREC fuse under the hood was blown. I didn't find it untill after cleaning the ground wires and changing the push button panel. Great video. Thanks!!!

[@joaquincanizalez1593]

4 years later you helped someone get back on the road, thanks to both.

[@whitetiger8652]

Thanks for the video, you are a good honest person.

[@adrew1400]

bro?! way ta' go man! makes me want to drive to Anchorage so you could work on my truck.

[@mikedewsberry1774]

Thanks for the useful information.....thanks for using the proper sockets on the impact as well

[@thomastommy1192]

Another great video thanks for sharing. Tim, I hope all is well with you my friend. Stay warm.

[@ThecardoctorTV]

Thank you Thomas! Its cold here but we are warm and well fed!

[@dustindupont3341]

Hey bud I owe you a beer I changed that part out and now it works great thanks for you video

[@joeandbeaucooley4151]

I have a service 4wd on my 04 z71. I replaced the front axle actuator and light is still on. Would this be my next thing to do? I checked the grounds already.

[@user-si1mb8js1w]

Many thanks your a good dude. Having a vehicle stolen he's on hard times. You are commended for your service for him.

[@kellygratton2819]

said you did a job for free through a man's hard times . good on you . Not many like you . Awesome.

[@verncampbell7239]

Awesome video. Your kindness is actually inspiring,in danger of making me a better man ....thanks and keep it up brotherman

[@OldTown1230912340]

thank you for the excellent video I am about to be faced with this and found your video tonight very informative.

[@ThecardoctorTV]

I hope it helped. Blessings

[@jpol3808]

Great video from Alaska! Good repair. And coudos for helping out your fellow man! Everyone should take that as an example of the right thing to do. Take care. Jpol.

[@ThecardoctorTV]

I appreciate the complement. I know there are a lot of really great techs out there. Just a few ding dongs making us all look bad. haha

[@Shaqknows]

Great video man! Thanks for your help

[@RodJ]

Thank you for showing us this. Mine is doing this.

[@dougmarkesbery6743]

Watching you do the actual work was very helpful

[@ericksmelendez3821]

Thank you very much i been following you on you tube you the best teacher keep it up

[@jsharp1776]

Thanks for helping out the poor man. Sounds like he has hit some hard times. Everyone should have compassion for his fellow man. Especially when you know what their circumstances are. It's not always about the almighty dollar. God will repay those who do right by their fellow men. God bless you and your family!

[@Steve_semblance]

Thank you so much!! Turns out all I had to do was clean the ground wires!

[@ThecardoctorTV]

Excellent

[@paulhowell7482]

Yo! Thanks for the video. I replaced my transfer case shift motor. I got a new one at O'Reilly's. Removed and installed it in an hour and 20 minutes, which included messing around with the ramps and getting the vehicle all safe. If viewers don't have a battery operated impact drill, now's the time to buy one, so you can take that gravel guard off in 20 seconds. I have a Rigid I bought at HD. The gravel guard bolts and 3 bolts on the T case motor are 15 mm. You can take the lower bolt out with the battery driven impact, but I used my 3/8" air ratchet for the middle and top bolts. I had to get them started with a long 3/8" ratchet first. They are tight and require some work to get them out, even after you get them started. Before you line the new one up, put the electrical connector on and turn on your ignition, hold your brake and put the truck in NEUTRAL and select 2 HI on the push button. This will line up the drive key on the T Case Shift Motor. Put it back in PARK and turn off your ignition and resume installation. PS: The drive shaft has a rubber boot on it with metal tie-wraps. You only need to cut the rear one. I goofed and cut both. I used a nice plastic tie-wrap on both when I put it back together. That boot is a tight fit, so it's not going anywhere. Thanks again! My 4WD is back in business!

[@osvaldo07108]

Hey Paul did your check engine light come on after your 4x4 stopped working? If that was the case what code were you getting? Thanks!

[@paulhowell7482]

@@osvaldo07108 No, I never got a check engine light. I only got the Service 4WD message.

[@osvaldo07108]

@@paulhowell7482 Hey did you had any indicator lights on the switch before changing the transfer case motor?

[@paulhowell7482]

@@osvaldo07108 Sometimes I would have no lights. Then days later it would randomly begin working again. Or it would randomly have 4WD Hi selected. I just had a feeling it was the transfer case shift motor. When you push the button to go into auto 4WD, that motor activates to engage the transfer case. If I did that, then put it back to 2WD that's when it would start failing. I figured that had to be the root cause of my problems, so I rolled the dice and changed it. Problem solved.

[@osvaldo07108]

@@paulhowell7482 Thanks for taking the time to answer my questions. I’m having that exact same problem with my 07 Tahoe. I’ll be replacing that transfer case shift motor soon Thanks again!

[@castledomeknives9395]

A Wiseman once told me,,never use an impact to install bolts onto a transmission/ transfercase

[@bjsorensen]

Great video. Thanks for posting. On my 2015 Silverado 1500 (4wd 5.3L V8), I noticed a burning smell and four-wheel high was engaged. The front diff fluid was changed about 30,000 miles ago. Any ideas on where to begin to troubleshoot this?

[@rodneymccluskey6248]

Yeah I wish you had you as my mechanic to you just bought make me want to drive from Alabama to Alaska do work on my truck good man! Honest as the day is long in the summertime in Alaska!

[@ThecardoctorTV]

haha, ill give you a discount if you make the trip. Take care

[@shawngarcia3414]

Thank you very much for uploading this video! I did as you recommended but my 4wd switch is still showing tcase in neutral. The lights don’t blink at all just showing red neutral light. I’ve replaced actuator, switch, and 4wd motor. I’ve also checked grounds and cleaned them. Could it be the TCCM?

[@catman581]

Your a good guy, for helping that family out. I believe in Karma. Thank you, Good video

[@zx8401ztv]

It sounds like that owner hasn't had much luck, we all have to pay for things but some people don't seem to get a break :-(. Sometimes i wonder if we should go back to basic rods and levers for basic stuff, overboard electronic controls are a problem just ready to fail. But if i had my way, there would be an engine computer only, everything else would be basic direct power switching. Too many computers for a tin box on wheels.

[@ThecardoctorTV]

We should go back to dogsleds!

[@zx8401ztv]

Yes but where would you shove the diagnostic tool on a faulty husky, no no i don't want to know :-D

[@ralphcasados8862]

Your a good man for helping folks in need. God Bless :)

[@shanek6582]

The little actuator motor that pushes in the 4x4 on the front axle of my 03 duramax isn’t getting power, I changed it (also put on a new transfer case shift motor) and cleaned up those ground wires but still no power, any advice? Thanks.

[@rogerw2101]

And you my friend are a GREAT MAN HELPING OUT

[@TheAlaskaCajun]

Tim, I'm still driving that 08 Silverado with the weird shifting out of 4x4 issue. I went ahead and threw the front actuator on the front diff and it still does it. Borman says he thinks its a worn out part in the front end and wants me to bring the front diff to him to rebuild. The struggle is real! haha, great video brother!

[@ThecardoctorTV]

Have you sampled the fluid in the diff? I’m sure if it has metal flak it probably needs some TLC. Too bad you sold your machine, you could use it to commute while your truck is down.

[@cj8172]

Hi mate great vid. Could I please ask a quick question about these 4wds? I've got a 99 blazer here in New Zealand and when changing into 4wd the little light keeps flashing instead of flashing then staying solid. It stays solid in 2wd, but 4Hi and 4 Low the light just flashes. I've just changed the vacuum hoses but it still does it.

[@ShadeTreeGeneralLee]

Thanks man that ground wire helped get my 4x4 working again. Definitely much appreciated…👍👍

[@aphotic2620]

I have the same issues and I replaced it with the Dorman as well. It worked for a minute then no lights on the dash 4wd buttons and service 4wd light is back on. Bad part?

[@CumminsDriver100]

Hey I have a question for you. On these same year trucks that have push button 4x4 but NOT the automatic 4x4 option, without the shift motor on and using channellocks, from four high to two high should be one click counter-clockwise correct? I'm working on a friend's truck and swear I saw this on KZbin somewhere but can't remember. Nothing I do can get that transfer case to manually shift...

[@jeffroW0331]

Solved this problem by getting rid of the np246 boat anchor in an '03 Tahoe. It's been almost 4 years since I pulled it and swapped it for an np241c with a 4x4 PosiLok for the front diff. Still works exactly how it should.

[@osvaldo07108]

Hey Tim was the check engine light on and if it was, what was the code you were getting? Thanks!

[@Iloveyhwh_1974]

I hit subscribe just because of your customer service, buddy! I just bought a ‘97 GMC 1500 4x4 step side. I’ll need your help along the way. Keep up the great work my friend.

[@mgaston2496]

good on you for helping out a fella in need. well done.

[@shaunmoeller3288]

I have an 03 Tahoe and my 4x4 switch lights quit working and got a message saying service 4 wheel drive so I changed the switch on the dash and still nothing.... What would you recommend to change or check next

[@jeremyb6012]

So I have an 07 Tahoe LTZ. I've had my mechanic check fuses, frame rail ground, put in a new module, even had a dealership program it. When I started the indicator didn't even have lights come on and there was no service message, after all this work it now say service 4x4 and the knob will light up when you start it and the indicator light is lit on the knob but no light anywhere else on the control (4hi, 4 lo, N). Any help would be appreciated. Please advise.

[@wyattoneable]

I have a similar truck so I'm paying attention Tim!

[@ThecardoctorTV]

Got don't pay attention to the part where I install a Dorman encoder motor and youll be ok...hahah, blessings friend. Hope things are good with you and the family.

[@LivingOnCash]

Great video! My '08 2500 wouldn't go into 4 low and got service 4x4 warning. My local shop, which is usually pretty good, told me I needed a new TC. I was suspicious and decided to hold off as I didn't use 4x4 low much. Now it won't go into 4 high and get same message. I will check the ground and then the TC motor. I don't think the shop checked either of them.

[@CendiMasway]

May I ask did it let you go into 2hi

[@jameszablan7340]

Hi Car doctor I have 1995 Chevy Silverado automatic four wheel stick on the floor. When I bought the thing used, I did the normal parking lot test yesterday to see if the four-wheel high and four-wheel low worked. Yesterday was my first opportunity to put it into four-wheel high it engage then while driving 1000 to 3000 rpm I put the shifter to neutral then put the floor stick to 4 lo it engage properly when I’m trying to put it back on 2h my floor stick stock on NEUTRAL,now i can’t move my truck..tried putting the shifter on neutral position (engine running)then tried to manually shift it to 2h or 4h or 2l still not working I’m worried coz every time I forced it I hear gear grinding noise. so right now the truck is not moving,stock on neutral..any idea what could be my issue? Help pls..trying to figure out by myself before spend money on mechanic.thank you

[@thesetruths1404]

Hi what's your experience with this? 2005 Yukon, 5.3L 4x4, 223,000 miles, all stock, daily driver. I can just hear a clicking sound that varies with wheel speed (not rpms) when all else is quiet in cab and windows are down, driving next to a wall or barrier, at 10/15 mph or faster. But ONLY under load with accelerator pressed. Does not click when coasting, or not moving. Comes from under vehicle. I figure either driveshaft u-joint or rear wheel bearing, or maybe parking brake hardware (park brake is out of adjustment), but what do you think? U-joints look ok. A smidgen of play that I can feel but not really see, by hand, same on both ends. Not tight or blown out. Sealed type. Thank ya!

[@dawinner777]

I’ve got a 06 and 4x4 worked fine. But I wanted to test it on another truck I was having problems with. I pushed the 4x4 buttons with the motor not bolted up. It moved once and now it seems not to work and isn’t clocked correctly. I did the same thing with a new Chinese motor hung it from the wires to see if it worked now that one won’t line up to the transfer case in any position and is positioned at about 11 o’clock any ideas?

[@scottmiller2278]

Thanks, your suggestion about the ground wire fixed my 2003 4WD Chevy Suburban. Also, the ABS system wasn't working and fixing the ground wire fixed that as well.

[@mastermechanic1154]

I'm having isses with my 4wd as well, switch works and changes on the dot. I can hear the transfer case working whenever I put it in 4hi or low, I checked my front diff engager and I also swapped out my transfer case module and still nothing. I'm not getting a service 4wd message either, swapped fluids in front diff and transfer case and checked for carnage everything seems fine. It feels like the front tires don't spin whenever it's under stress but I can hear the 4wd engaging, any ideas or tips on what else to try? It's a 2006 Silverado Z71.

[@bsmith2120]

Tim, 03’; start the truck in the morning and the 4L push button light is on. I can shift into neutral and push 2H and it will Switch. From then on it will work properly until I turn off the truck. Then back through the cycle. Nine times out of ten this is standard procedure. Any ideas for me? I’ve changed the switch twice.

[@walkman3720]

So my 96’ GMC Sierra k1500 4x4 went out. The 20 amp fuse was blown and now the 4HI and 4L lights are blinking, and there’s like a clicking sound in the dash but it’s in 2WD but those lights flash. And when you go and push the 2H button it doesn’t do anything. Any suggestions?

[@mansouralblooshi3004]

Thanks Doctor. Do you have any complaints from customers after installing Dorman products? Many people say they are not good. Whats your opinion?

[@ThecardoctorTV]

I have had these fail but only once or twice. If theres another good option its worth looking into. I stand behind my work so they would just come back for a replacement if it did fail. IM pretty confident this one will be fine.

[@albertoherreros9087]

Awsome video sir. Thank you for your time and knowledge

[@rascal728]

A friend gave me a pair of torsion bars they are the exact same length but about twice as thick would I have any problems if I replace them? Thanks brother

[@derrickrenault7532]

I have a chevy 2004 silverado extended cab 5.3ltr 4x4 indicator lights are intermittent, and majority of the time dont light up or function replaced indicator assy. Battery , did the ground thing , tried the reset , still having same problem and I'm tired of the service 4 wheel drive message . What do I have to do to fix it ,once inawhile when the indicator lights are on my 4wheel drive will work like supposed to but more often than not lights will be on and 4 wheel doesnt do anything

[@davidevans9621]

If you dont have the tool to put the tcase motor in neutral, after you remove the drive line, how do you know what the neutral position is by looking at it?

[@RP-zr2zr]

what cause my low beam to stay on when the car is off it 08 chevy tahoe

[@robinbanks4257]

... thank you for busting knuckles.. on the west coast USA.. I appreciate your work on KZbin as well peace.. from Chico CA..

[@tonyt160]

2006 sierra 1500 . My 4x4 push button works except for 4low. I press 4L and i hear a noise underneath as if the 4low is trying to engage, it does it every few seconds until i press 2h or 4h. Sometimes when driving it when i come to a stop the truck goes to AWD mode on its own. What can it be????? appreciate all the help i can get. Thanks

[@garyfowler6380]

great video helping customer and watching cost good mechanic

[@ThecardoctorTV]

Thanks Gary, im pretty sure most techs would do the same. Seems like most mechanics enjoy helping folks. Just a few give us a bad rap. Take care

[@TheLegitamit]

I had to get my motor replaced for my 2007 Chevy Silverado classic replaced; however, after replacement I still couldn't use my 4x4 system? the message still occurs. The system worked find for a day and then it stopped? Could this be from a blown fuse now?

[@a.m-gh7876]

I have a 2003 gmc yukon xl 2500 so i turn the 4hi on and turn the steering wheel to the end. The car does not move and stops and there is something stuck. Is this considered misuse or perhaps a malfunction?