Jump to content

Some GMC Sierra HD Units Will Need A Transmission Filter Replacement

Ozark Dually
 Share

Recommended Posts

revrnd Senior Enthusiast

revrnd

Posted
Posted
1 hour ago, 64BAwagon said:

I stopped today and have a tentative appointment next week at my local dealer. I also floated slipping the tech some $$ to put in the drain plug I have and they seemed receptive to it. (it helps that one of my boys used to work there and the service writer has known me for well over 10 yrs) 

I am hearing rumblings that this wasnt a process issue at the trans plant but rather a poor metal finish on some internal parts that may have caused some excess material to be shed ?  either way I am not excited about this. 

Something seems odd about this situation. So anyone that takes a 2024 or 2025 HD in for service, gets the transmission serviced? No breaking points for vehicles involved? Or is this part of the service, to determine when affected trucks were built. My truck and my brother's were both built in June of last year, when did 2025 production begin? So technically all HDs built over the past year could have this service done?

64BAwagon Senior Enthusiast

64BAwagon

Posted
Posted (edited)

I can only guess at how they came up with the timeframe for which units were affected. I suspect it has something to do with failure analysis on units that were warrantied and then that leading to an investigation into the part or parts that they believe may have caused it. Once they determine that they would go back and look for changes made to the item like finishing specs or new vendors etc. I have serious questions that likely wont get answered. I cant see any way that excess debris cycling through the trans could not be detrimental. I believe the filter is more than just a screen but how many times has that debris passed through the pump and all the orifices in the valve body ? Will there be other screens in the valve body that now are slightly restricted due to the debris being caught ?   

I cant help but think this is a stop gap and that there will be a much bigger. more expensive campaign around this trans. If NHTSA was involved it was likely a big screw up 

I think the "phased rollout" is to stop the inevitable stampede of people once they find out all those trucks are affected. Not to mention the run on filters and the ULV (both of which I have on hand at home) 

I also would be willing to bet that the techs will figure out a way to get the pan out without pulling the Y-pipe. My guess would be removing the bolts on the trans mount and jacking the trans up enough to clear the pan. Cant wait to see which one it is. 

Edited by 64BAwagon
  • Like 1
BuckWallace Enthusiast

BuckWallace

Posted
Posted
15 hours ago, revrnd said:

Something seems odd about this situation. So anyone that takes a 2024 or 2025 HD in for service, gets the transmission serviced? No breaking points for vehicles involved? Or is this part of the service, to determine when affected trucks were built. My truck and my brother's were both built in June of last year, when did 2025 production begin? So technically all HDs built over the past year could have this service done?

Good question. It doesn't seem to mention any symptoms that indicate this service is needed, so how do they determine which transmissions are affected? VIN list?

  • Like 1
Epsilon Plus Enthusiast

Epsilon Plus

Posted
Posted

Might be related to why so many FB group posts about 10 speeds eating valve bodies and the supposed national backorder on them.

  • Thanks 1
BuckWallace Enthusiast

BuckWallace

Posted
Posted
3 hours ago, Epsilon Plus said:

Might be related to why so many FB group posts about 10 speeds eating valve bodies and the supposed national backorder on them.

Have the HDs been experiencing the valve body issue as well? Seems like I've only seen it talked about on the 1/2 tons, but that's just anecdotal.

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

    342,915
    Total Members
    8,960
    Most Online
    ChristopherDobson
    Newest Member
    ChristopherDobson
    Joined

  • Who's Online   4 Members, 0 Anonymous, 1,295 Guests (See full list)

  • Latest Articles

  • Posts

    • KARNUT
      Vehicle Payments

      By KARNUT · Posted

      This is interesting. My quote tagged here is different from my original quote. After I’m driving them longer. That isn’t me. I don’t talk that way. I definitely wouldn’t express myself that way. Interesting.
    • UrbanRage
      What have you done to your K2 today?

      By UrbanRage · Posted

      I have the same running boards on my truck and I do agree they are bulky. I also find myself stepping over them when getting in and out of the truck. Besides providing protection to the rocker panels, they aren't very useful.  I will be replacing them soon with the Amp Powersteps. 
    • ChristopherDobson
      Vehicle Payments

      By ChristopherDobson · Posted

      Monthly payment is only part of the equation. With today's prices and interest rates, I'd look at the total monthly cost: payment, insurance, registration, fuel, maintenance, and expected repairs. A vehicle that fits comfortably into your budget is usually the better choice than stretching for a higher trim. I've also kept my vehicles longer over the past few years. New cars have gotten expensive enough that driving one for 10+ years, while staying on top of maintenance, often ends up being the most cost-effective approach.
    • Grumpy Bear
      OCI, not when but why?

      By Grumpy Bear · Posted

      10 Ford and Chevy engines proven to reach 300,000 miles   You may note a common 3K OCI on this list of gas motors. I skipped over the diesels. Dh'O. 
    • jake111
      Gasser Subforum Has Been Quiet - - So, Regenerative Braking and Using L10

      By jake111 · Posted

      Thanks newdude!  By the time manual selection is needed, I'm probably too much of a control-freak to depend on the transmission sensing braking to activate automatic downshifting.  I would be anticipating the situation and already be manually downshifting.   This truck replaced a 2004.5 LLY diesel with the Allison 5-speed.  Putting it in T/H made noticeable differences (when the torque converter locked, upshift points, downshift behavior).  On this 2024 gasser with the 10L1000 I haven't been able to detect much, if any, difference.  Ok, I can never tell now when the torque converter locks up.  But I also don't notice differences in shifting.  For downhills, I've probably already manually downshifted by then anyway.  Since it's also more awkward (than the 2004.5) to engage/disengage I don't even bother.  Or maybe it doesn't really matter with just a 3k lb. camper in the bed?   Thanks also for the list of reasons the charging system might select various voltages.  However, what I am seeing doesn't fall into any of those categories.  It very definitely, and very consistently, rises after coasting/braking.  Maybe not immediately, but not very long after coasting/braking.  Very consistently drops voltage when no longer coasting/braking.  It might also be interacting with the camper battery charging (I might disconnect the camper and see if it changes the charging behavior).  I also need to recheck turning on headlights for when I want to force it to charge the camper.   Another JR, in June I converted the camper to LiFePO4.  Since it's not a good idea to try to charge lithiums directly using truck, I installed a Victron Orion XS DC-DC charger (which BTW is AMAZING!!).  Being cheap, I only had to buy that one item (besides the battery, of course) to do the conversion.  The camper OEM 120v battery charger (only 19 years old and works perfectly) and the truck feed the input to the DC-DC charger (not at the same time).  But I didn't want the camper charger feeding back to the truck so I kept the old separator.  I considered replacing the separator with a 30amp diode but that means more work and might add another 1/2 volt drop.  One thing that surprised me was the voltage drop over the long 10awg wire run, so I can only charge smoothly at 8 amps (because the DC-DC charger is completely configurable).  Another reason I don't want an added voltage drop with the diode.  I might also be a little lazy but all this work is being done under the sink with a small cabinet opening.    

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...