Passlock™ System Bypass - GM
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- Опубліковано 30 жов 2022
- Come along as I show you how to bypass the Passlock™ security system that GM used in their older pickups and cars. It is a really simple system similar to their older PASS-Key system. The majority of people around here don't want to fix them properly because they are rust buckets. Can't blame them I guess....
-Enjoy!
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Disclaimer:
Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained. - Авто та транспорт
Sorry totally forgot the link for you guys. Here ya go!
*5k Variable Resistors, 5 Pack:* amzn.to/3WgCY9s
Hey Mr. O, that knife looks pretty slick. Can you tell us where you got it from?
Looks like someone bought all of resistors from the link. Lol. "Currently unavailable" is what it says.
Is it the same for a 98 my light is on as well
We've got the same issue going on, on a 2004 Silverado 2500 HD except for [if I'm testing right, I've got basic tools] sitting at 2.11v from the passlock signal and ground. Would that same resistor you linked work?
Edit: ended up being the BCM
Bought a set trash bought a second set so far into the 3rd of the new pack also trash.
The only time the GM anti-theft system prevented someone from starting the vehicle, was when the owner needed to start it. Dealt with this problem monthly on my 2002 Chevy Blazer. It would routinely take 6-10 minutes for the system to re-learn the key. Needless to say, I got real good at doing this.
Multiple 300,000 GM and have never had an issue...
Dealt with this in auto tech class. Needless to say I knew just what to do for this, but I didn't know of the physical bypass like Eric O. is doing here..
Needless to say I made $10 off that particular student that day 😂
An anti theft device that lasted 20 years is pretty freaking good
Another great well executed bypass
I had this problem with my 2003 Pontiac Grand Am GT. Fortunately, the only time it ever really "quit" on me is when it was near home. Like, I mean, right in front of the house if I went out to do groceries, then come home, unload, then want to take off again. It was absolutely a PITA when it happened. I didn't do anything about it as after about a year or two, she succumbed to rust problems and I bought my 2011 Chev Impala, which has NOT given me any kind of security issues yet. I still own it, she still runs fine. She's been side-stepped with a 2017 Chev Malibu Hybrid, but the Impala still goes out weekly for random trips. It's become a weekend boat.
Just a little tip. After you adjust the potentiometer take a dab of nail polish and put it on the screw and body of the potentiometer. It keeps it from moving with vibration and inadvertent knocks. Plus if it does get moved it's easy to tell. A little something memaw taught me!
What color for Fall?
Electronic tech for years, thanks for your explanation, saved me the hassle and my Memaw didn't know jack shlt !!!
And I'd put a little tag in there with "security bypassed with 1.3kOhm resistor" or something like that.
@@lexteakmialoki5544 same here Instrumentation Mechanic/Electrician in a chemical plant for 36 years. I've learned a trick or two.
lock tight would be more likely in Mr O's toolbox!
Amazing! Finally some one who not only understands but actually explains clearly.
From your previous bypass video I was able to get my mom's 2002 Impala to start correctly using two 2200 ohm 1/2 watt resistors in parallel...a big "Thank You" from me & her :)
1 watt WOW. That is one greedy security system. The battery must die after a long weekend.
@@robertsmith2956
It doesn't use a full watt but I wanted to make sure the resistors would never even get close to heating up while in use ;)
@@robertsmith2956
PS> You can use a 1/4 watt resistor but I am just a Safety Sally about my mom.
@@gregorythomas333 Not in the will huh. ;)
@@robertsmith2956
Not yet :D
Your collection of tools is impressive. Your knowledge of how to use those tools is even more impressive.
That's why he makes the big bucks!(or at least I hope he does) Eric is a top notch mechanic!
Awesome 😎
It's not the cost of the chalk. It's knowing where to put the mark.
We are a dying g breed, everyone wants a shortcut these days
@@phillipschutter24 You mean like the daily questions on FB car forums...my car died on me today and won't restart any guesses...LOL my god people. Then they get cranky when a guy tells em to take it to a shop
I appreciate your inexpensive fix for a lot of the older vehicles you work on. I'm sure your customers do as well.
$0.75 cents in parts, 1/2 hrs labor so it works.
or $$$ parts, and 2 hrs labor and it will fail again sometime in the future.
hmmm, what to do what to do......
@@robertsmith2956 did u mean u know another way? can u tell me ? thanks ..
Just putting this out there.....I absolutely love this channel. Gave me so much confidence over the last 10 years to do my own car repairs.
I'm an electrician, not a car mechanic, but after you showed us how this (did not) work several years back, I did several for both our own shop GM vans/trucks and friends' vehicles.
How GM always finds the worst possible 'theft prevention' system out of all the potential solutions is truly awe-inspiring.
Thank your for the great video this morning!
If GM finds a good solution they change it the next year.
ave. elechiken.. duclaw... yup, this is why i wont buy a new vehicle..1 thing shts,,it could be 1 of 10. unrelated problems.. blame the greenies & epa.. 1 exploding volcano, puts out more crap than we do in a thousand yrs.. funny,, there banning cows cos they fart.. do humans fart.?. lets ban humans.. cows have a secret fire,, they pick up burning stiks, & chase each other around when they want to fart..
@@Clearanceman2 when GM makes something good, it usually means that's the end for said product.
Damn it Jim, I'm an electrician not a mechanic. 😂
I think dodge has gm beat. When a dodge gets to rusty it won't start. Or like in my case my dodge dakota won't charge at 14v all from a rotten positive cable that is shorted internally.
GM, I watch your videos of your jobs and have developed a different approach of troubleshooting that has really improved my time on repairs
The Automotive Wizard strikes again!!! You can teach or write a book when you retire & you will make a lot of us very happy. Keep up the excellent work.
Thank you for the harness tour. No mystery just good old cabin contortium repair work!
Not everyone hates the crimp & seal, those are my go to solution when called for. Thank You and keep up the good work.
I love simple, smart repairs like this when the "smart" (relearn) version proves, well, not so smart after all. Thanks as always, Eric!
Cutting the wires…that cracked me up. I dig this channel. E has such a good sense of humor.
Thanks eric! Im about to do this very thing. Booked him in today. So a quick refresher is all i needed. Love the crimp and seal, as long as a feller dont puncture the seal when crimping.
Only thing I'd add is to put a drop of glue on the resistor to assure the value can't change
My Son and I were talking about my Father who was a mechanic specializing in front end alighment. He retired when the cars started to have electronics. When I was 15 they got in a 1954 Chev panel truck with a tired engine, He sat down on a bucket and had me do the overhaul. When my son reached 16 I found a 1985 Chev S-10 that had been run without oil. My turn to sit on the bucket and have him do the overhaul. It ran another 110,000 miles. I noticed you did the same thing with both girls, but no bucket. Good job !!
I've been using a 2.2k ohm resister soldered at the BCM connector. This eliminates any wire/connector issues to the column. Did the first one about 18 yrs ago and over 100 done, and never had any come back.
That's what I used to do. Sounds like he wanted to A: see if this works and B: keep from doing the 10 or 30 minute relearn.
Hi Scrappy, if you add in the 2.2 ohm resister will that eliminate the relearn process ? I have a 1998 with the 6.5 td & it is a pain in the a...
After installing the resistor, it will have to relearn the new value. By the way it's a 2.2K as in 2200 ohms.@@michaelmaloney436
After installing the resistor, you will have to learn the new value. By they way its's a 2.2K or 2200 ohm resistor.@@michaelmaloney436
How did you do that?
We had a similar situation with an early 90's Caprice. Key had a resistor built inside. Read with multimeter and replaced with a similar resistor under the steering column. Works every time. Thanks!
Found your channel a while ago Great Job 68 years old been pulling wenches most of my working life, just changed a steering column in a 98 c3500 thanks for the help it's refreshing to follow someone with the same mind set, remember if you make it look easy it makes them all wonder
Hi Airyfast, is a 1998 the same process ?
This was a nice clean fix! Looks SMA factory! Keep up the awesome work that You do Eric.👍
I remember having to do this in the early 2000's when we were installing remote start. Nowadays bypass modules are necessary on almost every vehicle but it makes installing a remote start alarm so much easier. Instead of having to connect to 20 or 30 wires now it's just a handful. Never tried the adjustable pot resistor, always had to meter it and rig up resistors within +/-10% of the value.
Thank you for this. Have been trying to bypass my security for about 2 months now. Thanks to this my truck is operational again, added aftermarket security and autostart while I was in there. Appreciate all the detail 💪😎
What a great, informative video. You truly do make me believe that "if you can do it, I can do it".
Thanks Eric - This video was a great help! Thought about spending the $80 on a new lock/sensor assembly and the all-day time and lack of tools that I really don't have before finding your bypass video. I have a 2004 Avalanche and the wiring configuration appears a bit different but I figured it out. My voltages were 5.0 and 1.7 across the leads with switch off/on respectively. I used some basic math with your values and set my resistor to 1,236 ohms. Tested the connection and had 1.65V across the leads so I tweaked the resistance until I had 1.7V again. Worked perfect - thanks again for sharing your knowledge!
Good morning Eric,
I hope you are doing well! I followed your bypass video and all seemed to go well. However, the security "feature" still persists. About an hour into driving the truck, the failure occurs. It usually starts with a radio malfunction and it dies. Then the Christmas tree of dashboard lights and gauges going offline begins. With the bypass resistor, I did notice the display cycles from Driver1/UNKNOWN DRIVER - slight difference from original problem.
I'm able to clear things with a battery disconnect/reconnect with an hour delay however, the failure occurs as described above. Is it possible that the BCM is the issue? I really appreciate all that you do!
Thanks again,
Aaron
Never seen this kind of a repair. Good job Eric 👍
*saw
I bought a 6.0 Silverado used for a winter vehicle a few years back,drove it home perfectly fine parked it changed all of the brakes and lines, and it never started again I spent hours upon hours researching looking for this fix and never found a good one I could follow to get the truck to start, and here you come years later and resolve it in 10 minutes. I love and hate this video all at the same time!
I spent years trying to fix this problem on my 98' k1500 after some idiot f'ed up an aftermarket security/remote start install. After buying a whole set of factory service manuals and getting stranded several times on job sites I finaly found that stupid aftermarket resistor under the steering column. God how I wish i knew about your channel and youtube in 2003. Love you man...keep it coming.
Wow! I've never seen that one before. You should learn something new every day. I've done that now! Thanks Mr O!
Love your videos. I've been struggling with the infamous "no-crank/no-start" problem on a 2001 Monte Carlo. Just when I think it's gone, it returns. The car was subject to the GM ignition switch recall a few years back and had the repair. When I pulled the ignition switch, the PASSLOCK sensor had been secured by a cable tie which had slipped, so I replaced it and added some electrical tape for good measure. Worked fine for several months, then out of the blue, the problem was back. I read somewhere that a weak battery can cause it too and since it tested as bad, I replaced it and the problem went away again for a couple of weeks, but suddenly returned. Just replaced the ignition switch housing with a Dorman from Amazon that was only $40. Found that the PASSLOCK connector seemed loose in the new one also, so I did the cable tie thing again. Car is cranking every time now, knock on wood. The sensor just clips into the ignition housing though, so I'm not sure how replacing the housing helps and I won't be surprised if it doesn't. I reused the old lock cylinder and existing keys. If it happens again, I'm going for your bypass solution.
I'm glad to say thanks to SMA I have easily started more than a dozen early 2000 model Chevy trucks and drove them directly to their 'new owners'. It's amazing how many of these trucks can be found right in your local Walmart parking lot.
Just followed this procedure on ‘99 newer body style Silverado and it worked flawlessly. Thanks!
I was expecting an intro like "This is the South Main Auto Channel, and what I have for you today is..." (reference to Lock Picking Lawyer intro for those that may not know)
I love those connectors and use them often. It beats soldering. great job Eric......Pete
I just started having this problem today. I am so glad to have found this fix. Great job in explaining and showing !!!
Eric, I think you have one more happy customer. Glad to see you didn't get any blood on those wires. Thanks for Sharing!
Eric, Nice work as usual! You sure do have a lot of tricks in your bag!
Laid up recovering from hip replacement. Really enjoy your work. Keep on going on!
Speedy recovery!
@@redarrow3722 Ditto!
Remember, don’t cross your legs!!😂
Just had my knee replaced. Hope you got lots of good pain meds. I’m dying here!
Nice job, Mr. O!
Nothing wrong with those solder sleeves.
Inside the driver footwell, no humidity, so no corrosion!
👍👍👍
Just another example of experience wins out. Love the commentary's.
Eric I have used shrink butt connectors for years and no problems.. When used on interior stuff I just crimp and shrink.. But on outter stuffs I use heat shrink over the butt connectors for extra protection.😉.. Great video Brother.. 🖒🖒
Don't know how often you do this type of work Mr. O but I got one would like to see more. As our vehicles get older, these immobilizer systems start to fail, leaving us stranded with many hundreds of dollars to be spent between towing, parts, and locksmithing.
That is true, but remember, not everyone used an immobilizer until at least 2004. I drive a 2003 Mazda Protege 5 wagon and it has no chipped keys so it does not have the immobilizer, but the 04, first year Mazda 3 does, as did many manufacturers by then. GM, and Ford did did this security thing on some models as far back as 1988 on the Corvette and Ford by the mid 90's when they went with a new key system on cars like the Contour. Some Chryslers may have had it before 2004-05 as my mother's Dodge Stratus (I think an 04 or 05) did not have it. Later models did however.
Just remember, this is about the only system you can easily bypass this way. Other methods of security, you can't just bypass with basic tools.
@snoopdogie187 oh Don't I know it. Had a Chrysler laid up for a week until the ECU was reflashed. Really no other way around it except having a mobile locksmith come or tow to a dealership which was big money
@@johnhpalmer6098 Late as '03, Dodge trucks didn't have chipped keys/fobs (or, they'd have one plus a plain steel one).
My security system is a 1997 pickup with 239K. Prior to that, you had to know which way to put a Dodge key into the ignition, back to at least the '65 Dart I had.
A great solution for a customer well done Mr O !
Well detailed. Love your videos. Loved the 2k ohm solution as well and that you shared the specific ohms of your system! Thank you.
Easy as security bypass Eric! Woohoo, I was still awake when this was posted on UA-cam at about 1230am Australian Eastern Standard time.
Always makes it look so easy.
I was scared there wouldn't be a video today; but getting one is a treat!
I would imagine that the majority of people understand the purpose of UA-cam incentive to encourage people to post comments is, so that it's A.I can read it, learn about the user, and also learn how to mimic personality.
With that said, double plus good job as always Mr. O.
Miss my 95' Sierra. She was pretty.
The cutting the wire brings me back to my military days . I sucked at math which by the way is VERY important when rigging charges of C4 . We all set our charges in the blow burms and we’re walking back as a group when my charge went off covering us with dirt and small rocks . I got better at math fast after that beat down
Some guy told me there is a method for calculating how much explosive to use for a particular blow... then you add "P" factor... P for Plenty.
@@obsoleteprofessor2034 😂😂👊🏻 yup
Calculate how much explosive you need then double that value. But don't miscalculate the time it takes for a fuse.
@@paullinkins8121 yes that is the most important. I was a no go that day 😵💫
This math has its limits when the ground is jungle saturated. Had the demonstrators for blowing a mortar pit with C4 use the book to calculate the amount needed to get the proper depth for one with insurance to go deeper. Nope, the hole was deep enough to get the minimum distance. (Jungle Operations Training Center in January of 1989.)
Passlock was a terrible design even when it worked properly. Thanks for another great video! (Mrs Tizzo is playing all of your videos in slow motion to see if you got the magnet and put it on the fridge. Lol)
Your the best . Because you can do it, now we all can do it . Great video Aaron from Canada .
Thanks for posting this. Too late for me. I had a 98 Bonneville that I junked due to this issue. No start security light flashing and it locked the trans and key in the column. I feel dumb now for scrapping it.
Missed the dot of hot melt glue or rtv on the Rvar screw. Keeps it from vibrating out and changing the value over time.
Aligned probably a thousand transceivers by now. Know how many move after adjustment? None. Aviation, ground vehicles, rack radios. Nothing moves. I'll put high temp tamper wax... just to keep people honest.
@@ShainAndrews You must have better quality components and vehicles than I do! Have not done thousands, and have had more than one of those variable resistors change over time. Especially on high frequency motor controllers. Hit the right speed, they walk right out.
NOTHING SHORT OF WELL TRAINED BRILLIANCE!!!
This is the best automotive repair channel ever. Really nice work. Wish I was closer to your shop.
I always get nervous snipping wires with the battery connected. Great video Mr.O
Good engineering there. Whenever I used a variable device like your resistor, when I got it set I would put a dab of fingernail polish on the screw and housing to hold it in place. If you ever need to adjust it again the nail polish breaks free easily.
Great video. That was a nice workaround on an older truck.
Great video as always. Keep up the good work.
Ive done it with blazers and s10s, no need to find the resistance etc, I simply cut the wires and connect them to themselves. Leave the key on for 45 minutes with the charger hooked up to follow the relearn procedure and you now have a 0 ohm key! Ive done this 6 or so times over the years
I had a 1987 corvette and I remember cutting a wire under the dash and putting in a resistor that matched the chip on the key. I had no problem after that.
Another great smart work-a-round to a problem is why we watch your channel.
When your hands were shaking over which wire to cut, I was scared. Didn't want my favorite UA-camr to explode.
Back in the early 90's I did so many of that bypass that I was having dreams about it. I worked for the city and one key fix the whole fleet of the police car and such. We had to do a lot of rekeying on the door's trunk lids and all.
Old caprices were ALL keyed alike from GM and did not come with pats. They came with a circle key that worked every single police car in the country.
For cutting tape and whatnot on harnesses, a seam ripper for sewing is a godsend. Just be sure to tilt it away from the wires after you get under the tape so you don't stab or gash a wire.
Had a 2002 Buick Lesabre doing that. Back in 2009. Shop charged me $400 to bypass it. Thanks for the video
thanks for trimming the zip tie ends...I hate how some ppl leave them long and unfinished! One of my many pet peeves!
An alternative to the razor blade approach is use of an X-Acto type knife. They have multiple type (curved straight, tspered, etc.) Replaceable blades. X-Acto’s also come in a couple of physical sizes (with appropriate blade types) as well.😳
I just did this last week, must of got lucky. I use a 10 ohm resistor I had laying around and didn't have to do the relearn. 2000 Silverado
Great video Eric. Some shops won't bypass that resistor. They will make you buy the theft module. Great job as always.
God bless anyone that makes my laziness less shameful. 😅 Good video, I learned something new...
The crimp and seal connectors are what we stock and are recommended to use for wire repairs at the dealer
Also the GM standard in assembly plants now :)
always learn something new with Eric's videos. What else can you use those resisters for?
At least for seat belt bing bong
"Make it look like Best Buys been here" - Love it, you ain't wrong!
Eric,
Great video and fix - thank you! On this day I was hoping to see you guys as you really are - you as the wizard and Mrs. O as Glinda.
SMA#1
Paul (in MA)
Love the crimp and seal connectors. Been working at a GM dealership for 30 years and haven’t had problems with them. The only problem is when the parts department buys cheap ones. It happened today installing a trailer brake controller, crimped the connector and the wire pulled out when I was testing it. SMH
They are the best in my opinion.
They are quick to use, excellent in tight spots like under the dash and in the engine bay.
You have to be sure to get a good crimp, which means a good crimping tool too. I like the heat shrink connectors.
I ordered a 10 pack of the Variable resistors (5k) to make my own ($8.00), What a great bypass and video. Question: What if you cut wires and attached resistor and had someone crank while you adjusted setting (until it starts) --- would be a little more "mission impossible" lol. This old mechanic loves your videos. Thank you very much for your time.
Did that work for you ?
@@andrewcampbell7280 I did get the 10 pack (they took forever to arrive) but after replacing the Ignition harness on my 1998 Yukon, I tried the key and it started! Not sure why because I didn't do the 10/10/10 procedure for relearn. Guess I just got lucky and the resistor in the new harness was the same.
You are such a super mechanic. I belive you are uniqe because you know the electronics and the hard mechanics. Not many do!
I was just saying to myself “I wish Eric O would post another repair vid using crimp connectors” and low and behold! Very ASMR
Another great video showing how NOT to throw hundreds of dollars in GM's pocket buying parts that aren't needed. We all wish we had a mechanic like you in our area. But no appearance by Mrs. O? No Halloween treat for us, I guess 😉.
“ Gotta be careful fella *slams gear shift into park*” 😂 Can’t tell ya how many times I have done that and the shift link cable broke the stud clean off the trans. Now I move it carefully and slowly 1 gear at a time and pray!
You have the best solutions for this stuff. Thanks!
Pretty entertaining. VERY informative. Pretty sure this is the fix for my 01 Park Avenue. I’m gonna give it a shot. Thank you very much.
I like the crimp, shrink wrap and solder joints at the same time ones
"As long as it's sharp enough to cut you when you slip you'll be ok"
I thought this was the only way.
Thanks for the video. Straight forward - even I could follow along!
sweet piece of work mr O
Seeing those internal capacitors going across the terminals on the module explains the reason these fail... caps will leak , short or open after so many years
"The strongest lock in the world is one that nobody can open" - General Maintenance in 1999
Always appreciate the videos, thanks!
Had theftlock activate when I changed the radio in or eldorado, my local auto tech did what your doing here, fixed the problem, except for when the car was warmed up it randomly would not not start, I would typically wait ten to thirty minutes and then it would start and drive, Like your vids, longtime viewers, don't always leave a comment but do always watch and like, Have a Great Weekend Pal
I love seeing the truly amazing durability of automobiles. Every car ever made WILL finally age to a point where it can NOT be fixed. GM engineers designed this GMC to last 5 years without a major repair. They did that so that the car would be affordable. Yet here it is running at 21-years-old. That "key recognition system" is an electronic device and yet it lasted 21 years. Do you have a cell phone that old? A TV that old? A computer that old? Right. I repeat, this is amazing.
I have a telephone that's older than this. (It's also rotary.) 😛
@@LadyAnuB Visited my childhood home in 2018, after 60 years, the wall-mounted, rotary phone was still working. But... that is my point. To buy a new-technology phone that durable today, you would have to spend thousands of dollars. To buy a car that durable is certainly possible, but it would cost several million dollars. That rotary phone was owned by the phone company, and they sent a repairman to the house to fix it at no cost to the homeowner. AT&T did not want them to need repair.
Time and time again the crimp and seal have proven to have as good of a connection as solder when installed correctly.
Dude! I love your videos and learn so much from you brother. Thanks for making my life easier
sweet video Eric...thank you Sir!
Also, where the wires pass through the connector, little more towards the key, they rub through and short. The steering wheel tilters experience this problem.
Nice video, please put the link to buy those resisters. Thanks
👍👍
Smashing out the new videos! Thanks Eric O. & family.
Reply to myself.. "Make it look like Best Buy has been here" =)
Thank you for another great video brother. I am by no means a mechanic but due to not being able to afford to pay a mechanic I have to do it all myself. I have a 2005 Silverado 2500hd with a 6.0 and your videos have helped me on every single repair I've done. Just wanted to thank you brother keep the videos coming