Jump to content

Recall - Vacuum Pump May Decrease Power Brake Assist

Retired Bob
 Share

Recommended Posts

1SLOW1500 Senior Enthusiast

1SLOW1500

Posted
Posted
1 hour ago, njk4o5 said:

so are they replacing the pump or just tuning it?

Both. On the recall it is tune. if there is further issues and damage replace. Golden question is How far they take it. Do you get the "new" pump and a tune or pump, tune, line booster and master? Do you need all that maybe not but hate to learn the answer the hard way. I still haven't done mine. Maybe next week. 

I'm lazy/busy so they come to my house and deal with it. 

  • Replies 206
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

camcamaro1991
camcamaro1991

As a former discount tire employee (days of 5 were hired and only 3 could keep their job, today auditions are gone), started back in the firestone/ford recall days, and later becoming a MB Master tech

jay webb
jay webb

ok the special coverage is for a faulty vacuum pump which is a mechanical pump attached to the engine. this is not a  recall. the recall is a reprogram of the EBCM software. two separate things. now i

Mike GMC
Mike GMC

So now we need an extended warranty on the ABS unit to cover premature wear from using it in normal braking?  Seems like yet another band aide to me.  That Corvette electric pump is looking better and

Posted Images

njk4o5 Enthusiast

njk4o5

Posted
Posted

well my powertrain warranty was up a while back it will be good to see the guys at the dealer again its been a while since I've spent some time there

njk4o5 Enthusiast

njk4o5

Posted
Posted

well my powertrain warranty was up a while back it will be good to see the guys at the dealer again its been a while since I've spent some time there

jumpinjoe Enthusiast

jumpinjoe

Posted
Posted

Had the recall taken care of yesterday. It took about an hour, excluding the free wash job.

 

Regards,

Joe

1SLOW1500 Senior Enthusiast

1SLOW1500

Posted
Posted
Anybody with tuned trucks flashing back to stock before taking your truck in?  
No need. And not the part that changes. But is the reason on the heavy modes vehicles why I recommend customers get there own device. Then you have the option.

Sent from my SM-N960U using Tapatalk

Granite7 Enthusiast

Granite7

Posted
Posted

I had the recall done a month ago. The MyChevrolet app still shows I require a recall. Is this my dealer being lazy and not transmitting the service record? Is it the strike delaying updates? How long does it usually take for maintenance history to show up in the app?


Sent from my iPhone using Tapatalk

jumpinjoe Enthusiast

jumpinjoe

Posted
Posted

Sorry Granit7, but new to this board and haven't figured how to private message or email here yet, but the answer to your question is simply I don't know. It seems to me it could be any of the reasons you mentioned. In my case, I wouldn't expect it to be uploaded this soon since I had it done late PM on Tuesday. I'll check tomorrow to see if it's been cleared and get back to you.

 

Regards,

jumpinjoe

Mileguru Enthusiast

Mileguru

Posted
Posted

I don't remember if I got this recall notice or not, but suppose I did. What should I do in my modified truck situation?

Magnuson TVS 1900 Supercharger, methanol, and a tune. Should I flash back to stock while at the dealer, have them do the part and tune, then reflash my supercharger tune back onto the truck? I ask because it is possible to have a dealership update your tune and then you can reinstall your old supercharger tune through HP Tuners or an AutoCal.

jumpinjoe Enthusiast

jumpinjoe

Posted
Posted

Mileguru, I think for sure I would flash back to stock for a couple reasons. You already mentioned a couple important ones, but the one I'm most concerned about is that some dealers are getting more and more conscience of these aftermarket flashes and calling foul. I've heard horror stories of cancelling warranties, causing glitches then claiming it was your reflash, etc. Now with an '06 that may not even be a consideration, but I just can't say for sure. I'm not sure but don't think the 06's were involved in this particular recall. You might want to double check.

 

Oh hell, sorry 'bout that. I saw the '06 Sierra 5.3 in your profile and completely missed the '17 6.2. No doubt it's in the recall.

 

In my opinion, I simply wouldn't take the chance. Flash it back to stock, take it in and get the recall done if it's required, then go home and do your reflash. Doing that you win both ways.

 

Regards,

jumpinjoe

jumpinjoe Enthusiast

jumpinjoe

Posted
Posted
6 hours ago, Jacoby said:

Anybody with tuned trucks flashing back to stock before taking your truck in?  

 

i really don't know a lot about these reflashes since I'm not particularly up on high tech. Fact is I still have a hard time just spelling 'IBM'. But from what I do understand, I wouldn't take the chance.

 

Flash it back to stock, get the recall done, then reflash. It's a win/win for you with no practical way of getting hurt.

 

Regards,

jumpinjoe

jumpinjoe Enthusiast

jumpinjoe

Posted
Posted (edited)

Guys, I'm new here but more than willing to offer the help I can where I have experience, but this high tech stuff just ain't my forte'. I barely get by with a little email, and an occasional call on a cell phone. You young guns who grew up with this stuff really have no idea just how hard some of this comes to us a little older. I still have a hard time spelling 'IBM'.

 

I was born back when there were still everyday cars on the road that were cranked by hand out front of the radiator. When you could stuff a flat tire with grass/straw from a field on the side of the road and make it on into town. Even before B/W TV was available to the general public. We had a great big ol' RCA wooden boxed radio that on Saturday nights daddy would run a long wire out to the truck battery so we could all listen to the Grand Ol' Opry. And I still can't set the clock on a VCR. Just suffice it to say that I grew up so far out in the country, that when I wanted to go hunting I had to go TOWARDS town.

 

So, when I say anything regarding high tech stuff like reflash, I do know what it means, but not a clue as to how to do it, or how volatile it might be at your dealer. And it's because of my limited knowledge in the field that I always err on the side of caution and suggest the safest way to me, even if it might be something completely understandable to someone else.

 

Didn't quite finish my engineering degree due to a little scrap going on over in Southeast Asia that I had to go straighten out, and had great job opportunities offered to me when I returned that made it worthwhile to go to work instead of back to school. But, I do have a pretty good background in mechanics, most mechanical things, designing, fabricating, circle track racing, breaking green horses and often being broken by green horses. I've often spent most of my pocket money on hard liquor, good country music, and chasing wild women ...... most all the rest I threw away foolishly.

 

So call on me anytime you think I might be able to help and if I can I'll jump in with both feet. So far I've really enjoyed reading a lot of the topics in this forum, but I'm still having a little issue here and there either replying or answering messages. Give me a little while and maybe I'll get the hang of it. And yeh, I have to go back and edit often. I've got to become a better poof reader!

 

Best regards,

jumpinjoe

 

PS: Have absolutely no idea why I first wrote 'Far East'......... Duhh!  I sometimes type a little faster than I think.

 

Edited by jumpinjoe
to correct terminology
  • Like 1
  • Thanks 1
mikedeezxxx Enthusiast

mikedeezxxx

Posted
Posted
I don't remember if I got this recall notice or not, but suppose I did. What should I do in my modified truck situation?
Magnuson TVS 1900 Supercharger, methanol, and a tune. Should I flash back to stock while at the dealer, have them do the part and tune, then reflash my supercharger tune back onto the truck? I ask because it is possible to have a dealership update your tune and then you can reinstall your old supercharger tune through HP Tuners or an AutoCal.

I don’t think it will matter. They are gonna see your super charger when they pop the hood. If they’re cool, you’ll get by. Otherwise, if they are warranty Natzi’s, your gonna get a hard time.


Sent from my iPhone using Tapatalk
15 Z71 Senior Enthusiast

15 Z71

Posted
Posted

So let me get this straight. I still need to go have recall done. Which I'm doing next week. If vacuum pump fails after recall and would mess up break booster and what not ,it is still covered under special warranty.? Pump and everything it messes up correct?

1SLOW1500 Senior Enthusiast

1SLOW1500

Posted
Posted

I don’t think it will matter. They are gonna see your super charger when they pop the hood. If they’re cool, you’ll get by. Otherwise, if they are warranty Natzi’s, your gonna get a hard time.


Sent from my iPhone using Tapatalk
Toy will get the flash either way. First the update has nothing at all to do with tune it is a different control module all together. 2nd they get paid to service the vehicle and as it is a preapproved service recall all they have to do is get the vin and say they did it. So they want to do it. If and it will not but if it affects your tune they will say it is on you as it is and we all k ow that. This again is why I say have a device and your tune saved. Then you can simply thank the man pay nothing and int he parking lot....read,save, write. Then drive off.
Maybe at low boost you could idle out of service bay but you are not driving home un tuned. This is why I say the new "keys" to the truck are in the software so save file on thump drive and reccomend owning a device.

Sent from my SM-N960U using Tapatalk

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.5k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,924
    Total Members
    8,960
    Most Online
    KirbyCo
    Newest Member
    KirbyCo
    Joined

  • Who's Online   2 Members, 0 Anonymous, 1,472 Guests (See full list)

  • Latest Articles

  • Posts

    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      I will be doing that for sure, but I need to solve who has/ where I can find a bidirectional scan tool that will support OBD 1.5. I'm kicking myself because I ebay'ed a Snap On MT2500 that I didn't think I'd ever need anymore. D'oh!! I'd rather not buy another, so I'll contact a few local shops to see if they have one and how much they'd want to do the procedure. I'd rather have the ability to do it myself... I wish there was a modern tool that could do it all, but I'd have no idea what to buy.   The theory with the pulled timing is that it mimics a rich condition. The delayed spark causes incomplete burn and the O2 sensor picks up low oxygen levels. That's interpreted as a rich condition so the PCM pulls fuel and that shows up in the deeply negative fuel trims.
    • Chuck FB
      Joke Thread

      By Chuck FB · Posted

      An ultra wealthy man had the most beautiful daughter. But, there was a problem. Everything she touched would melt in her hands. No matter what, Metal, Wood, Stone. Anything she touched would melt. She could not feed herself. Because of this, men were afraid of her. Nobody would dare marry her. Her father was despaired. What could he do to help his daughter? He consulted doctors, scientists and anybody who could solve this problem. Finally one of them said, "If your daughter touches one thing that does not melt in her hands, she will be cured." He was overjoyed and came up with a plan. The next day, he held a competition. Any man who could bring his daughter an object that would not melt in her hands would be given billions of dollars to marry her. Three extremely intelligent and handsome young men took up the challenge. The first brought a very heavy steel rod, But alas, when the she touched it, it completely melted in a matter of seconds. He sadly went away. The second brought a beautiful diamond, knowing diamonds were one of the hardest substance in the world and would not melt. But alas, once she held it in her hand, it melted. He too was sent away disappointed. So now, there was one left He was very nervous & sweating. He approached the daughter & said, “put your hand in my pants pocket and feel what is in there." She did exactly what he asked. She felt something very hard. She held it in her hand, squeezing it as hard as she could. It did not melt & remained extremely hard. Her father was overjoyed. Everybody was overjoyed. She was finally cured. Nothing never, ever melted in her hand again. They married and they both lived happily ever after, raising a wonderful family. Question: What was in the the groom’s pants pocket??? Answer below ↓ M&Ms of course! They melt in your mouth, not in your hand. What on earth were you thinking?
    • asilverblazer
      Wow I'm in a pickle. (Broke down truck) and a story.

      By asilverblazer · Posted

      There's a bunch of tea leaves that you've read, but in any case the delayed timing is unusual. Not sure how that relates to the rich at idle vs. 'normal' while driving.   If you're in this deep, might be worth investigating, and re-learning the sensor. What have you got to lose? Plus, it properly fixes the timing cover leak.
    • asilverblazer
      Wow I'm in a pickle. (Broke down truck) and a story.

      By asilverblazer · Posted

      The only problem I have seen this cause is longer crank times. 
    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      Injector is being sent off today for rebuild and I estimate I'll have it back in 10 days or so.   It may not be the injector...of course...now that I've torn down the intake again. But, let's rule out the injector and replace those spider legs that have been almost rubbed through.   The truck has always had negative timing and I'm reading "normal" timing at warm idle should be +16 or so. I'm negative 16 to 25 or more, and it's always been like that since I bought it.   A light turned on upstairs last night in the old noggin. Rare, I know...   This will be wild, if it turns out to be the cause!   In 2001, according to the old service documentation, the muffler was replaced. Why? I have no idea, it wouldn't have been rusted through by then. But they did a crappy job.   In 2019, another shop replaced it and noted the prior install was poorly done on the work order. "Exhaust system vibrates on crossmember". Except...I guess they just left it be? I believe the husband, the couple who were original owners, had passed by then. Maybe she said it's just not worth it to have the exhaust system fixed and declined repairs. Very few miles were driven between 2019 and 2025.   The exhaust system vibrates heavily on the crossmember and you can feel it and REALLY hear it, even today. Not always, but at idle, it gets going pretty good sometimes.   What if....   ....What if that's enough to trigger one or both of the knock sensors? Could it be tricking the sensors into sensing knock, so it's pulling timing aggressively? Pulling timing heavily means it's firing after the piston reaches full height which means incomplete burn which means the O2 sensor is sensing a rich condition, which means I've been chasing my tail, and what I thought was an inconsequential problem (janky exhaust) has been THE issue for this truck for 25 solid years?   That would be wild. Maybe it IS wild.   The service documentation thereafter, for years, shows visits for rough idle, replacing O2's, replacing the cat, replacing plugs and wires, a misfire condition, like they could never solve the issue. The injector has been replaced 4 times in 80k miles, that's just crazy.   The secondary theory....   The engine has clearly had a leak at the front seal for a very long time (the greasy trench...). I think the truck changed hands quickly ~2025 because there's Napa receipts from someone I don't recognize in the ownership history. They apparently replaced the timing cover seal, and they did a terrible job. There's RTV smeared all over and the leak I had reduced to a weep by snugging the front oil pan bolts is now a leak again.   HOWEVER....I read about replacing the crankshaft position sensor. Any time the ckp sensor is disturbed or timing cover is removed, the truck requires relearning, and that can only be done through a bi-directional scan tool. Skippy with the RTV probably didn't do the relearn procedure is my guess. His scan tool is lost in a pile of RTV goo somewhere.   So, it's very possible the sensor has been disturbed and the truck is just running on the old learn data but not setting a code for anything. The distributor has since been replaced and so has the camshaft position sensor, so all bets are off for that thing.   In the theme of one step forward, two steps back, I returned the accumulator for the AC. The gal I've been working with at O'Really's has been great. She refunded it under manufacturer's defect and we compared it to the replacement I ordered, and sure enough, the replacement is machined very differently (and a gauge actually fits on it!).   Got it home, installed it, started vacuuming it down.... and I couldn't get good vacuum.   The high side service port, where I replaced the old GM ball valve suspecting that was a source of the previous leak....well, I've clearly exposed whatever pre-existing crack in the line where the service port is welded, and made it much worse. Blessing in disguise? Except there goes another $25, now I'm waiting for a replacement AC line.   In 10-ish days ALL the parts will be here. Rebuilt injector, new exhaust system, new cat, new high pressure AC line.   Oh, did I mention the squeaking ISN'T coming from the AC pump? The truck still squeaks when started, and there were words after I started it with the new AC pump installed. But, there was more to replacing the AC pump for just a squeak. A truck with good working AC is something of value, for the comfort alone.   I've ordered a new harmonic balancer because, 30 years is a good run for one of those. Rule it out. The squeak may be something more sinister, though. I'm worried about that ckp sensor and if it was shimmed correctly, or if the timing set was installed correctly. The squeak may be coming from UNDER the timing cover.   At this point, once I get it put back together, I'm thinking I'll take a 50 mile victory lap and then promptly put it up for sale. This truck is cursed. Betty, from beyond the grave, doesn't want anyone messing with her Blazer. Or maybe she's getting revenge for 30 years of shop visits with that thing.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...