Jump to content

Anybody see this yet?

haider320
 Share

Recommended Posts

voided3 Enthusiast

voided3

Posted
Posted

Thanks for pointing that out. Our '21 Silverado 1500 (Nov. 2020 production date) was one of the early ones affected and that's a bummer that there still may be vehicles in dealer stock with the same issue. Had I known, I would have bought a 2500 with the 6.6 gas engine instead.

Muddturtle1231 Enthusiast

Muddturtle1231

Posted
Posted

Does this mean that those of us that already bought a 2021 will have to wait for it to have problems before being repaired?  Or, will there be a recall?

BlaineBug Enthusiast

BlaineBug

Posted
Posted (edited)

That's a lot of vehicles to fix.  But no different than any other recall that affects millions of vehicles.  I'm curious though this issue affects prior generations too.  But apparently it's "especially" awful for all of the 2021 models.  However I do see that the Sierra was excluded? 

Edited by BlaineBug
voided3 Enthusiast

voided3

Posted
Posted
31 minutes ago, Muddturtle1231 said:

Does this mean that those of us that already bought a 2021 will have to wait for it to have problems before being repaired?  Or, will there be a recall?

At the moment, yes, you will bring it in when it starts to misfire and throws a check engine code (typically P0300). I have a suspicion that there eventually will be a recall, given the growing scale of the issue, which you can always check for by your VIN number online or they should send you something in the mail if there is one.

crj19 Enthusiast

crj19

Posted
Posted
15 minutes ago, Desrunner said:

It references L84 and L87 engines, but not the L82. Why?

Because they are no longer putting the L82 in the Silverado. 

newdude Senior Enthusiast

newdude

Posted
Posted (edited)
2 hours ago, Muddturtle1231 said:

Does this mean that those of us that already bought a 2021 will have to wait for it to have problems before being repaired?  Or, will there be a recall?

 

This will be a VIN specific coverage.  If it will apply to your truck, you'd be able to pull your VIN in the GM recall search to see if its covered.  

 

GM is calling this a Service Update, not a recall.  It expires November 2022.  To start with also, this Service Update will only apply to new stock that has yet to be delivered to dealers.  

 

Quote

 

This service update involves vehicles in dealer inventory only and will expire November 30, 2022.

 

When this bulletin is first released, all affected vehicles will be in transit from GM. It is very important that the procedure in this bulletin be performed on all vehicles upon arrival at the dealership. DO NOT sell or deliver one of these vehicles to a customer until the procedure in this bulletin is complete an the field action is closed.

 

Dealers must take the steps necessary to ensure that the service update correction has been made to all involved vehicles in dealer inventory before selling or dealer-trading the vehicle, but no later than November 30, 2022.

 

 

 

The customer side of this has not been fully released yet.  Don't go running off to the dealer just yet, if there is a customer portion of this Service Update, it will have a NEW # to go with it as well as possibly being a recall or special coverage, so hang tight.

 

 

2 hours ago, BlaineBug said:

That's a lot of vehicles to fix.  But no different than any other recall that affects millions of vehicles.  I'm curious though this issue affects prior generations too.  But apparently it's "especially" awful for all of the 2021 models.  However I do see that the Sierra was excluded? 

 

Sierra is on the list.  

 

1 hour ago, Desrunner said:

It references L84 and L87 engines, but not the L82. Why?

 

Not sure as to why this is.  The only thing that comes to mind is the fact that the L82 is an AFM motor, only 4 cylinders deactivate and they are probably seeing much less issues.  L84 and L87 are DFM so all 8 cylinders can deactivate, and there has been a strong showing of lifter failure in those two engines.  

 

1 hour ago, crj19 said:

Because they are no longer putting the L82 in the Silverado. 

 

For the 2021 model year, yes they were.  L82 is not in 2022 Silverado/Sierra anymore.  Those are all now the L84.  

Edited by newdude
newdude Senior Enthusiast

newdude

Posted
Posted (edited)

Re-iterating a couple parts from my reply above.

 

This will be a VIN specific coverage.  If it will apply to your truck, you'd be able to pull your VIN in the GM recall search to see if its covered.  

 

GM is calling this a Service Update, not a recall.  It expires November 2022.  To start with also, this Service Update will only apply to new stock that has yet to be delivered to dealers.  

 

The customer side of this has not been fully released yet.  Don't go running off to the dealer just yet, if there is a customer portion of this Service Update, it will have a NEW # to go with it as well as possibly being a recall or special coverage, so hang tight.

Edited by newdude
haider320 Enthusiast

haider320

Posted
  • Author
Posted
3 hours ago, BlaineBug said:

That's a lot of vehicles to fix.  But no different than any other recall that affects millions of vehicles.  I'm curious though this issue affects prior generations too.  But apparently it's "especially" awful for all of the 2021 models.  However I do see that the Sierra was excluded? 

I saw this too.  How can the Chevy 5.3 have this notice but not the Sierra?

BlaineBug Enthusiast

BlaineBug

Posted
Posted
3 hours ago, haider320 said:

I saw this too.  How can the Chevy 5.3 have this notice but not the Sierra?

The Sierra 5.3 and 6.2 is definitely just as susceptible.  Already watched some youtube videos with lifter failure on a brand new-ish Sierra last summer.

BlaineBug Enthusiast

BlaineBug

Posted
Posted
4 hours ago, newdude said:

 

This will be a VIN specific coverage.  If it will apply to your truck, you'd be able to pull your VIN in the GM recall search to see if its covered.  

 

GM is calling this a Service Update, not a recall.  It expires November 2022.  To start with also, this Service Update will only apply to new stock that has yet to be delivered to dealers.  

 

 

 

The customer side of this has not been fully released yet.  Don't go running off to the dealer just yet, if there is a customer portion of this Service Update, it will have a NEW # to go with it as well as possibly being a recall or special coverage, so hang tight.

 

 

 

Sierra is on the list.  

 

 

Not sure as to why this is.  The only thing that comes to mind is the fact that the L82 is an AFM motor, only 4 cylinders deactivate and they are probably seeing much less issues.  L84 and L87 are DFM so all 8 cylinders can deactivate, and there has been a strong showing of lifter failure in those two engines.  

 

 

For the 2021 model year, yes they were.  L82 is not in 2022 Silverado/Sierra anymore.  Those are all now the L84.  

L82 is active fuel management (v4/v8 mode) and the L84 is dynamic fuel management which allows the engine to operate on as few as 2 cylinders, am I right?

Desrunner Enthusiast

Desrunner

Posted
Posted
5 minutes ago, BlaineBug said:

L82 is active fuel management (v4/v8 mode) and the L84 is dynamic fuel management which allows the engine to operate on as few as 2 cylinders, am I right?

That sounds right to me but does that mean different lifters as well? I have an L82 without AFM (-$50 credit). Having all 8 all the time… priceless.

haider320 Enthusiast

haider320

Posted
  • Author
Posted

My 2021 is one of the 2021's that does not have DFM.  It's in V8 mode all the time. I wonder if I'll be good?

newdude Senior Enthusiast

newdude

Posted
Posted (edited)
11 hours ago, BlaineBug said:

L82 is active fuel management (v4/v8 mode) and the L84 is dynamic fuel management which allows the engine to operate on as few as 2 cylinders, am I right?

 

Correct.  

 

11 hours ago, Desrunner said:

That sounds right to me but does that mean different lifters as well? I have an L82 without AFM (-$50 credit). Having all 8 all the time… priceless.

 

No.  Same lifters.  Also, trucks built with the AFM $50 credit still have all the parts, just none of it functions.  Think just like putting in a Range AFM disabler/Pulsar LT except its permanent.

 

10 hours ago, haider320 said:

My 2021 is one of the 2021's that does not have DFM.  It's in V8 mode all the time. I wonder if I'll be good?

 

Should be.  Hardware is still in the engine but won't ever have a chance to operate.  Permanently disabled and GM has no plans to enable on those trucks.  

 

14 hours ago, haider320 said:

I saw this too.  How can the Chevy 5.3 have this notice but not the Sierra?

 

Sierra is on the list.  GMAuthority sucks and can't read.  

Edited by newdude

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

  • Latest Articles

  • Posts

    • PunchT37
      OCI, not when but why?

      By PunchT37 · Posted

      My brother has a 2007 Avalanche with afm 5.3. It`s got 176,000 miles. Runs like a clock. Never been apart. Co worker has a 2010 Tahoe with afm 5.3. 230,000 miles. Never been apart. Runs like a clock. So, even though cyl deac is a weak spot, they can go the distance.   BUT, these engines had the oil changed regularly, AND had 5w30 as spec. I wonder if they would have lasted this far on 0w20? I`ll bet not.
    • Chuck FB
      OCI, not when but why?

      By Chuck FB · Posted

      I certainly could be wrong but I hear of pickups far newer than that 2007 cutoff which may not be going to the wrecker but are having engine work done and be that a reman engine or new engine or trying to repair the existing engine. Some of it would be design issues as per the cylinder deactivation system that GM has and one of those lifters wiping out the cam and the question of oil changes moving the needle or not on that whole mess, or in the case of Ford pickup engines that have the long timing chains and wearing them out and the roller followers and phasers and some of that certainly goes back to oil change intervals. But in those various cases the truck has all sorts of life left in it and so the unfortunate owner and may be original owner or used market owner that is pouring money into repairs so the truck is not seeing the salvage yard yet but damage is happening by infrequent oil changes. A friends son had bought a 2018 I think it is half ton GM and it had some sort of extended or used dealer warranty on it and of course the lifter issue bites and its rattling and so the dealer had to swallow the bill and was at least 7000.00 and I think they only replaced what they felt they had to replace so yeah, I can see that being a ticking time bomb in the not too distant future. Would frequent oil changes cure all these engineering "marvels", probably not but some engine designs have shown that they do much better if the oil is changed a lot more often then if the manufacturer service claims are followed. New trucks cost so much that there is an incentive to keep the existing truck on the road by repairing. 
    • davester
      Tranmission stays in Low

      By davester · Posted

      get a good code reader, and find out what problems the truck has noticed by reading codes. cheap ones can only get basic engine codes, you may want to get one that can get codes from all the computers in your truck.
    • asilverblazer
      OCI, not when but why?

      By asilverblazer · Posted

      This is sort of my point, salvage yards aren't overflowing with all these 'poorly' maintained trucks - excellent/good/servicable condition otherwise, salvaged only as a result of a bad engine from poor oil change regiment.    In my area, there are no 2007 to newer gm trucks/suvs in any salvage yards. A few are in the 'recyclers' with very obvious reasons for being there - wrecked.
    • asilverblazer
      Stabilitrak conversion to Z71

      By asilverblazer · Posted

      Stabilitrack was a stability control, traction control system, that functioned independently from the transfer case.   Z-71 has nothing to do with the transfer case or differential.   If it does have an AWD system, my memory recalls this being specific to the Denali trim, converting won't be as simple as swapping out mechanical parts like differentials and transfer cases. It will require reprogramming at a minimum. Long story short, not likely worth it.   Pulling a fuse, may disable the AWD system, it might also prevent any other transfer case functions.   However, the AWD case was generally based on the same transfer case you refer to in the 2006 Suburban. If it still has a 4-High and 4-Low where the transfer case locks and splits power 50-50 front to rear, what are you gaining by changing anything? A true-rear wheel drive only, what good will that serve? Not enough to go through the trouble of changing out all the parts.    Generally, all the factory systems will handle a 33" tire and re-gearing. Probably a 35" tire too, if you aren't driving like a caveman. If 35" tires are in the plan...   If you do plan on driving like a caveman or are fully committed to 35" tires, an entire re-think of the build is probably in order. Starting with square one, an IFS front end isn't going to be the best starting point for 35's and caveman driving. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...