This is a great video. Very informative, professional and direct...this is exactly what I need to bleed the brakes on my '97 K1500. Thank you!

Yes someone that takes the to do great job of explaining the procedures ‼️🙏🏻🇺🇸❤️✝️

thank you for your page! I bought a Tech2 on FB market place for $80 & didn't work! I took it apart & removed the bios battery & waited for a 1/2hr & tested the battery & reinstalled & it t/on & it booted up it works GREAT!

Rewatching this outstanding KZread for the millionth time and now in possession of the Tech 2 Clone, I noticed you didn't do something I always do when bleeding. I "turkey baster" the MC dry as I can, wipe the insides with a perfectly clean towel and then fill with new brake fluid. Why pump old stuff through? Also, for me anyway, it helps to see the clean stuff coming through so I know I am getting close to being all flushed out of old bad stuff. Just a recommendation that has worked for me for the past 45 years (well, except on my Model A as it has mechanical brakes).

Great video, now I know why my brake pedal in my 01 express conversion van, isn't that hard after replacing the calipers, I had no idea, that this procedure had to be done, I have bled the brakes, 6 times and the brake pedal is not as hard, as when I bought the van?

Great video, thanks 👍

Wow great video Info, and well done , all to the point. wondering if you or some one could give us a link for an inexpensive diagnostic reader that would include the breaks for the same vehicle 97 k 1500

Thank you! I have watched many videos for this same problem. Best description, verbal and video I have seen on this subject. Just need a link for the Tech 2 clone please.

@DrShock

4 жыл бұрын

Thanks, there's an eBay search link for them in the description.

Thanks!

very good information thanks,,,,the Scanner that you are using can do that job on a chevy Astro 98 AWD.......

You are the man DrShock... Thank you again Sir... 🙏💯✌

Good Stuff

Just ran across your vids very helpful ! You got a sub & big thumbs up from me ! Mind if I ask where you got your tech 2 clone at? I’ve got to get one so I can do the abs bleed on my 02 Chevy & alcohol content reset on a buddies 13 Chevy truck.

@DrShock

4 жыл бұрын

I bought it on eBay along long time ago (before the MDI clones came out). Tech2 clones are harder to find now but they still come up. I wouldn't trust buying from Aliexpress but rather a US based venue like eBay instead.

Good stuff brother thank you for this now I can bleed my own brakes when I get my tech 2 in the mail could you please do a video on how to set timing on a vortec 350 using the tech 2 and a cam relearn thanks

Found the service manual online at the library! 🙌🎉 Where are the internal bleed screws/valves on the EHCU ? Chilton’s says it’s “on either side of the unit” and I need to, “turn them 1/4-1/2 turn”. However, no picture is supplied. 😔

@DrShock

2 жыл бұрын

Yeah public libraries can often be a treasure trove of automotive technical info. Those screws are for the older units, the 4WAL from 1996 and up only can be bleed with the Tech2 scan tool.

I'm going to try to build one.

From watching your videos, I am doing (have ordered all the parts): Timken bearings/hubs, calipers, lines, rotors, pads, upper and Lower Ball Joints, upper A-Arm Bushings. My ABS light has been on for 100K miles. I am hoping the sensors that come with the Timken hubs will fix that. My truck has "Hydroboost". I plan to pressure bleed (old school) with the tool you recommended. I followed your link and did not see your Scan Tool (the same one you have). Do I really need to do that?? All cars/trucks are old school bled by the wheel furthest from the Master Cylinder first and then working towards the MC. If I was to do an old school pressure bleed as you have, would it be crazy expensive to have GMC/Chevy do the "Auto Bleed" with the tool? My truck is 1996 GMC, K2500 Suburban, 7.4 Liter Gas, 8600 GVW. Thank you for another outstanding KZread. We all learn from you.

@DrShock

4 жыл бұрын

Unless you've let the master cylinder run dry from a leak or you're replacing the ABS brake computer components, no you do not "have" to do the scan tool procedure for bleeding air from say a caliper or wheel cylinder replacement alone.

@leehayes5181

2 жыл бұрын

Time you make all this you save money take it in

I have a 97 Astro van i need bleed my abs module what scanner will i need can u help me out thanks like your video

Your clear bleeder line fits the nipples really well. What type/size tubing is that and where did you purchase it? Thanks again!

@DrShock

4 жыл бұрын

Home Depot, surprisingly. I don't recall the size anymore but you could take an old bleeder screw with you to match up.

awesome info, one question for you did that pressure bottle over fill the master cylinder reservoir

@DrShock

3 жыл бұрын

It keeps it topped off for the whole procedure so you can one man it, when you're done if its a little over you just remove the power bleeder unit and bleed out the overage manually with your brake master cover back on.

@krichards8472

3 жыл бұрын

@@DrShock thanks Doc

Liked commented and subscribed

great video but low audio! tech2 clone works great!

Excelent video. If I replace the MC and then bleed the MC and the ABS with your procedure, do I still need to bleed each individual brake? Some of my bleed screws are extreme hard to release thats why I ask. Thanks

@DrShock

2 жыл бұрын

This procedure is only for bleeding the ABS module itself (the Kelsey-Hayes 4WAL unit). It doesn't bleed the lines, disc calipers, or the rear drum wheel cylinders. Those all have to be done manually. In the video I show how to do that using the Motiv pressure bleeding tool.

@claudiobertoglia4434

2 жыл бұрын

@@DrShock Thanks

Sir I'm about to try this procedure tonight. I have a 97' c3500 crew cab dually with 6.5 turbo diesel engine. 4l80e tranny... Had brake problems ever since letting a idiot work on my truck a few years ago. He brokE rear driver side brake line. All fluid lost. Also changed master cylinder. (Obviously we replaced broke brake line) changed all calipers and wheel cylinders pads ,shoes etc. But ever since then could never get good pedal like before he messed with it and brakes seems to drag intermittently.. some times they do, sometimes they don't. Recently bottom lead pin fell out of ABS box. I got a used box from junkyard and installed today. Never knew we had to do this procedure. any further advice? THANK YOU so much Update: hooked up scanning tonight. Performed Auto bleed sequence. Somehow the pin in the lower bleeder that faces the engine blew out of this box also just like the other one. This is the design that has a bleeder on top one on bottom and two directly under the brake lines. The one on bottom I assume is for the rear brakes but not positive on that

@DrShock

Жыл бұрын

For the years with the automated bleed procedures, you are not supposed to manually manipulate the bleeder orifices on the brake pressure modulator valve (BPMV), which is part of the 4WAL ABS module. This is all done electronically for your 1997 model. I can't say I've ever heard of, or even read of, these to be _popping_ out during the Tech2 procedure. This sounds like just having bad luck with two defective BPMVs in a row. There is some more technical info about this module in this other vid I did kzread.info/dash/bejne/k2Slt6Zvk8Wxfqw.html

How do you access the rear bleeder valve on a 1995 gmc 1 ton dually? I can't fit a wrench in there and there's not enough room for me to apply the plastic tube.

@DrShock

2 жыл бұрын

Maybe this will help kzread.info/dash/bejne/pIuomruff8apm7A.html

Hi there nice vid. I'm just asking if you have that pressure kit bleeder so you don't need run the engine and pump the pedal brake to bleed each brake?

@DrShock

3 жыл бұрын

That's right, makes for a one man job and it goes much faster as well when doing a brake fluid flush.

@marcusiya1915

3 жыл бұрын

@@DrShock thank you sir. But the thing is my car is asian and m looking to amazon that kit and it say won't fit to my car causing maybe the reservoir fluid cup.

@DrShock

3 жыл бұрын

They have many models from that same company that have different caps, the video is for a GM truck so the model there is just for that one. You'll have to go to their website and find out what model is for your car.

if you have to add more fluid into pressure bottle and pump back up to pressure will it put air into master cylinder and then into brake lines?

@DrShock

2 жыл бұрын

No, there's no air at all inside the pressure bottle hose to the master cylinder. As long as you keep the bottle topped off with brake fluid you'll be fine. This type of tool actually fills the master cylinder to the brim of the adapter you mount on top, forcing all the air out before you begin. ;-)

Hi,when you frist pressureized the reservoir, wouldent you push air into the system without adding break fluid ?

@DrShock

2 жыл бұрын

You definitely do not do this on a dry master cylinder; you have to have fluid already topped off in there first. But the way the Motiv adapter is designed the air will be displaced by the fluid under pressure.

Hearing impaired.. impossible to hear you.. boost audio when editing.. nice video

Dr where did you get there tech2 from

I have a 96 c1500 and am looking to change the final drive ratio and tire size in the ecu so that my dashboard and ABS work correctly. My question is does the knockoff tech2 allow that? What about the MDI tool knockoffs using tech2win?

@DrShock

4 жыл бұрын

These Tech2 clones are exact functional copies. There's no difference when it comes to using TIS2000 or TIS2Web either. I haven't personally tried the MDI clone with Tech2Win (no need) but I've heard that they are also a spot on copy with the highest quality ones. With the MDI clones you have to contend with really bad ones that are not fully compatible with the GM MDI unfortunately, I did another video on how to spot the higher quality one here - kzread.info/dash/bejne/oo6auteuqrK4itI.html

@pmcquay1

4 жыл бұрын

@@DrShock So does this mean that I can adjust the tire size in both my ecu and the abs controller using a tech2? I've read conflicting reports from a lot of places and I'd like to make sure before dropping hundreds of dollars on something that may not be able to do what I want. For reference, I am planning on changing from 3.42 gears to 4.10, and from stock tires to 33's.

@DrShock

4 жыл бұрын

I have not personally made such a change in my vehicles or those I've worked on so I can't answer this with clarity for you. The Tech2 does have a Tire Size Calibration under the ABS area, that I can see. In fact I see someone did a video on where the menu in the Tech2 for this is (but that video has no sound) you might search "Tech2 tire size" and find it. I've actually never seen a Tech2 setting to change this attribute for the PCM/ECU though but that could just mean it's not available on the particular vehicles I've worked on.

Hi Drshock Dan from the UK here I have a big break kit for my astra van would I just need to use Tech2 after the bleed as I have to change all the hose and calibers on the front

@DrShock

Жыл бұрын

The Tech2 is going to _auto_ bleed out the ABS module primarily, for 1996 and later type vehicles via the OBDII interface. Some GM vehicles, like I showed, will also assist in manually bleeding the calipers/wheel cylinders but you have to also have a power bleeder unit connected to the master cylinder for that part to be useful. If you don't have ABS, the Tech2 is not going to be needed. But the power bleeder can be a real time saver.

Is there a way to bleed breaks without the tech 2 device?

@DrShock

4 жыл бұрын

This isn't needed for bleeding the brakes themselves, but the ABS module only. You do need a scan tool (others besides the Tech2 support this function) to bleed the module. Some folks might suggest some more unsafe routes but I won't recommend those here.

Hello Is this procedure only for bleeding from the MC down to the Kelsey Hayes ABS module output? I need to change the MC (I have read in forums guys that fit 2000 Tahoe MC on a 1998 Tahoe and gives a much beter braking)

@DrShock

2 жыл бұрын

The Tech2 procedure is only for the ABS unit internally. Won't do anything for the master cylinder, or anything out to the wheels. But is a necessary step to get air out of the Kelsey-Hayes 4WAL ABS design.

@leehudson3597

8 ай бұрын

Awesome video very informative. Will this system work on a 2000 chevy C3500 dually

Have you tried this on a 1995 Chevy ? 1995 has OBD1 and I don’t want to purchase one and it doesn’t fit. Also, do you have another link where I can purchase the Tech2 that you have if I choose to buy one ?

@DrShock

2 жыл бұрын

I have not tried this particular procedure on a truck older than 1996, though the service information implies it goes back to 1995 that could be a case of earlier built 95s can't do it but later built 95s can. Not sure there. A Tech2 supports both OBD1 and OBD2, and includes connectors for either (as well as other one-off plugs). I have links in the description for the Tech2, and the other tools I show in my videos. You definitely might want to

How is that Tech- 2 clone doing for diagnosing other things after all this time? Can I use the tech 2 on my 96 C1500? Also on the Kelsey-Hayes I have 3 runner caps: 1 on the side for “purge valve” and 2 down below the in/out hydronic lines. What are those 2 caps covering? I can’t find a diagram to tell me. I think that is where my leak is coming from. Where can I order a service manual for my year truck (if they are still being printed)?

@DrShock

2 жыл бұрын

I've been using the Tech2 clone for about five years now, never have come across a problem. If you get the higher end/most expensive copy they are nearly identical to the Bosch one. You absolutely can use the Tech2 on your 96, there's a search link in the description of this video. On a 96, that would be a Kelsey-Hayes EBC310 model ABS. The two black rubber caps that face towards the firewall are ports are from the brake pressure modulator valve (BPMV) assembly. The ones on the sides, facing each fender, are part of the combination valve assembly. If the side ones are leaking, then the combo valve needs to be replaced (hard to do though as discontinued years ago). If the firewall facing ports are leaking, then the BPMV needs replacing (but again hard to do since discontinued years ago). There are no rebuilders for the 310 type ABS, and no source other than GM/ACDelco originally for these parts. So best bet is a salvage yard swap. I have a vid on the EBC310 4WAL tear down coming up later this month. The hard copy service manuals for such an old vehicle are long out of print, bu you can often find them used on eBay.

@AnthonyWrenn

2 жыл бұрын

Thanks for there very quick reply! It’s one of the 2 facing the cab. Does pressure build up behind those caps to blow them off? I am hoping just replacing the cap will stop the slow leak….if it’s only coming from that. I’ll take a look for the scan tool using that link. Do the clones come with instructions? When using the pressure bleeder setup you have is it like gravity bleeding where you leave the line on the wheel open till the bubbles stop? Or should I press the brake sometimes/or just before opening that bleed valve?

@DrShock

2 жыл бұрын

There's no pressure that would _normally_ occur at those ports. The rubber covers are just dust boots, they will not stop a leak of any significance. If the dust boot is missing, it's usually just because it rotted off or was accidentally bumped off. Even the genuine Tech2 does not come with much in the way of instruction. These are GM dealership grade tools, all of the _usage_ information is contained within the service bulletins and manuals the GM techs would reference. When using a Motiv Power Bleeder you don't touch the pedal, you just bleed each wheel cylinder/caliper as required and the pressure does the work for you. It's like any other bleed procedure, only that you don't need a helper and can work outside the vehicle entirely. Open the bleeder valve, watch that the air bubbles are cleared, move onto the next valve. You just need to not let the fluid run out of the power bleeder or you'll pull air and be starting over. The ABS units BPMV has to be bled using a Tech2 scan tool though.

@AnthonyWrenn

2 жыл бұрын

@@DrShock Thanks for the great information! Now I just gotta find the service manual and a TECH 2 (or maybe I'll just drive it to the dealer to have them Auto bleed it (& I think changing the fluid) for the $129. Gotta figure out what is best since I never needed a scan tool for this truck before. But at the eBay prices of around $400 it might be beneficial. So to make sure I am clear (on everything I have looked up) there are no newer scan tools that will do this Auto ABS Bleed job, right? I am uploading images of my ABS into a video right now on my channel since I am not sure if my module was an original part (I am 2nd owner) Title is: Kelsey-Hayes ABS module from a 1996 Chevy C1500.

@DrShock

2 жыл бұрын

The newer GM tool would be the MDI cable, which would run Tech2Win (a Windows app that emulates a Tech2 on a laptop). But it's essentially the same as the original 90s tool.

Does it need to be pressurized? i have a harbor frieght power bleeder...will that work instead? im gonna be using tech2win. thanks

@DrShock

Жыл бұрын

You need to move the fluid thru the lines in order to push out the air. The Motiv power bleeder is just an efficient way to do that, and one man the operation. There are several brands of such tools. But you can also just pump the breaks old school style as well.

Is this the same for 03 chevy silverado ext cab?

@DrShock

4 жыл бұрын

I only work on these older body style trucks so I wouldn't know for sure. But I see a few google hits on forums where folks imply they used it on those newer style trucks.

Great video. I’m looking to buy a tech2 clone to perform a brake flush on my 98 c1500. My question is will the tech2 clone be ready to perform this task out the box with the gm card or will I need a computer to set it up first?

@DrShock

2 жыл бұрын

Yep, they boot off that card and are ready to go. I have a link for where to buy them in the description. A Tech2 is completely self contained, you don't need a PC/laptop unless you want to program a new module using the SPS feature.

@WhatLarry

2 жыл бұрын

@@DrShock Thank You

so what do you do if your scantool thinks the truck is moving at 2 mph? it won't autobleed?

@DrShock

4 жыл бұрын

Hmm, that's odd. Haven't ran into that one. Wheel speed sensor problem?

@burban98

4 жыл бұрын

i had the same issue. I started engine ran in D and R and then into P. Connected and disconnected each time and eventually got it to work. Hope this helps.

So you run the auto bleed with the bleeders closed????? Then gravity bleed.... or power bleed ?

@DrShock

9 ай бұрын

We cover two GM service manual procedures in this video. The auto bleed is a Tech2 scan tool function for the model years covered in the video title only. For these OBS C/K trucks it applies only to the ABS brake pressure modulator valve (BPMV) and has nothing to do with wheel cylinder or caliper bleeding. Then we show how to use a Motive power bleeder to purge air from the brake lines going to both the calipers (front) and wheel cylinders (rear). The video shows where and when you open bleed valves on this more conventional step.

@platostien189

9 ай бұрын

@@DrShock thank you

A need a scanner for autobleed on a 97 astro van can you help me out i bought like 4 scanner not one xan bleed

@DrShock

6 ай бұрын

This kind of function is going to be limited to high end dealer grade bi-directional tools only not in a scanner. Like the GM Tech2 I showed, or its clone. It would also be part of the ACDelco Tech2Win emulator that you can use with a J2534 diagnostic interface (such as the GM MDI). It may also be in an aftermarket bi-directional tool (higher end of the line) from Launch, Thinkcar, or Autel.

So this procedure only applies to 1996-2002 then since 1995 is obd1, correct?

@DrShock

Жыл бұрын

The 1995 has the Kelsey-Hayes EBC310 ABS but yeah without OBDII I believe you would need to do this with a Tech I or an OBD I adapter on the Tech 2. I personally haven't tried doing a 95 with this procedure yet.

@Ksquizzles4209

Жыл бұрын

@@DrShock I've got a 95 in the shop right now. This is about the only thing we haven't tried. I was under the understanding that the plunger on the top side of the ABS unit should remove air in the unit. Replaced all the lines on the truck, rear drums/cylinders and master cylinder. just can't get these things to harden up.

Can you do a 1995 gmc sierra 1500 with that tech 2?

@DrShock

Жыл бұрын

You can if it has OBD2 for the Tech2 to communicate with it. 1995 was a transition year for OBD2, most vehicles will still have OBD1. The Tech2 will come with both an OBD1 and OBD2 adapter, but as best I recall the automated bleed was an OBD2 feature only.

@mauropedraza3969

Жыл бұрын

Well if this helps, it has a kelsey hayes 4wal system that I believe air got in it when I upgraded the master cylinder and rear brakes to disc an I know a tech 1a can perform an auto bleed on this system but just trying to find out if the tech 2 could.

@DrShock

Жыл бұрын

It does. I don't have access to a 1995 truck to verify it, but if a Tech 1A tool could do it on a 1995 truck then a Tech2 should as well as it's a super set of the older tools functionality. You may have to attach the OBDI adapter to the Tech2 if your 95 doesn't have the OBDII type diagnostic port though. I have used a Tech2 with 1995 trucks in the past using the OBDI adapter, just not for this specific ABS function.

Have you tried this on a 1995 model year, my tech 2 doesn’t have the abs automated bleed as a option that I can find up until the year 1998

@DrShock

4 жыл бұрын

I have not personally tried it on that year, but the 4WAL ABS computer that the feature applies to was listed as an option for that year so I included it. Your ABS would need to be the Kelsey-Hayes made 4WAL type, not the RWAL type. You can tell under the hood, the ABS unit would say Kelsey-Hayes right on top. Also 1995 probably doesn't have the full ODBII spec implemented at the ADLC you are plugging the Tech2 into as that didn't start until 1996, though I'm not sure that would effect what you see in the menu options.

@coreyharkcom7658

4 жыл бұрын

I do have the Kelsey-Hayes system I figured it might have something to do with it not being obd 2 but even if I try for a 1996 or 97 it doesn’t show as an option, I’ve seen where multiple people are using the tech 2 for the abs bleed procedure on the obd1 was just trying to figure out if I was doing something wrong.

@DrShock

4 жыл бұрын

It would not be the first time I've seen menu options move or disappear between years of the same vehicle. Check this list of menu paths from GM, and search for "Automated Bleed". Perhaps for 95 it's under a different menu, if so please comment back so we all know. gsi.ext.gm.com/userguides/GM_Tech2_Paths.pdf

@coreyharkcom7658

4 жыл бұрын

Automated Bleed - Chassis > 4WAL 3 Sensor > Special Functions My menu is Function - Chassis > 4WAL 3 Sensor > Special Functions. The automated bleed was not listed in any of my menus or submenus however I did try something listed under 4wal 3 sensor called function This does run my abs system but I believe it runs it faster than what the automated bleed runs so I don’t know if I will have the same results. My guess is that this is just to run the abs to make sure everything is working as it should. Cycles the abs 5 times vs the 6 it does with the automated bleed. Thanks for your help

looks like i need a pressure tester .

So no need to open the bleeder screws while performing auto bleed.

@DrShock

5 жыл бұрын

No need for the procedure on these OBS trucks, as I mentioned for cars and newer vehicles the scan tool will probably have you open them up as instructed. However if you're going to do a power bleed anyway, I'd also do the automated bleed first.

@flexer83

5 жыл бұрын

@@DrShock thanks man. 👍

@claudiobertoglia4434

Жыл бұрын

Had the same question...Thinking where all that air goes to, if you do not open de bleeder screws?? Asummng there is air traped somewhere from the master cilinder to the ABS module...

@claudiobertoglia4434

Жыл бұрын

@DrShock

@DrShock

Жыл бұрын

The Kelsey-Hayes 4WAL ABS brake pressure modulator valve (BPMV) module is self bleeding for these particular years, when actuated by the GM Tech2 scan tool. It may drip out some brake fluid as well when these small solenoid type valves open up on the sides to purge air during this procedure. This procedure doesn't do anything for air trapped in disc brake calipers or drum brake wheel cylinders. Those you bleed in the conventional fashion, but using a pressure bleeder like the Motive unit can save time.

Hi buddy, I have an issue with a K1500 4WAL Kelsey Hayes, I changed everything > wheel cylinder/ brake line / brake hose / master cylinder / calipers / brake boosters. I tried to bleed the ABS system with a Tech2, I had the trouble code "Front right speed sensor circuit open" who got me unable to "Automated Bleed" the circuit, do you any advice? (I changed the front speed sensor too)

@DrShock

3 жыл бұрын

That DTC code implies the right (passenger side with left being drivers side) front sensor harness was damaged during the maintenance work you've described. After replacing the sensor harness (part of the sensor if you used an ACDelco replacement) you should be able to clear the code with the Tech2 and repeat the brake bleed. If not, then the harness damage is most likely not the sensor part but within the frame mounted one it connects into. This doesn't necessarily have to have happened during the brake maintenance, it could be a worn wiring insulation that you just disturbed that was there all along.

@manoa2484

3 жыл бұрын

Is it possible to put the old system (with the proportioning valve) under my master cylinder instead of the big 4WAL system ? (I will delete the rear antilock)

@DrShock

3 жыл бұрын

idk, have not attempted such a mod.

the question is how to do it without tech2

@DrShock

3 жыл бұрын

Other scan tools will have this functionality. But you have to have a scan tool of some sort to perform the procedure safely.

@DmiA

3 жыл бұрын

With scan tools it will be easy. But i dont have one. At the moment, the way I know without scan tools is to bleed the brakes, brake several times until the abs are triggered on the sand or grass and bleed the brakes again.

buy this we're is internet Scan

@DrShock

5 жыл бұрын

No clue what you're asking here

Another dumb idea by GM