Jump to content

2015 Sierra Denali Trans Failure

tjaudet829

Recommended Posts

Snowcamo Senior Enthusiast

Snowcamo

Posted
Posted

Question to The OP.

Did you or the others you know by chance notice a whining sound at any point? It would be very similar to a power steering wine like when the wheels are turning left or right on an older vehicle.

Sent from my LG-G710 using Tapatalk

  • Replies 64
  • Created
  • Last Reply
It's Tim Senior Enthusiast

It's Tim

Posted
Posted
1 hour ago, tjaudet829 said:

First off I want to thank those who defended me. 

I will try every avenue I can with GM to have them cover.

I have 3 friends and a son with Gm trucks 

2014 sierra 130k trans gone

2015 sierra 120k trans gone

2015 sierra denali 100k trans gone (mine)

2015 sierra denali 106k still chugging but owner is concerned

2018 Silverado my son just bought 20k ok for now

all of the above have 5.3L (not sure what trans on these) I have not driven all of these for 100k nor have I counted the number of shifts ? 

Were all these vehicles with issues subjected to a "transmission flush"?

 

2017Darkness Enthusiast

2017Darkness

Posted
Posted

Depending on the flush chemical provider, i.e., BG, they will usually carry a warranty when using their chemicals for flushes.

tjaudet829 Enthusiast

tjaudet829

Posted
  • Author
Posted
10 minutes ago, It's Tim said:

Were all these vehicles with issues subjected to a "transmission flush"?

 

I cannot say if the others were flushed or not.

I know the 2015 denali with 106k has not been flushed. still running too hmmm

 

tjaudet829 Enthusiast

tjaudet829

Posted
  • Author
Posted
28 minutes ago, Snowcamo said:

Question to The OP.

Did you or the others you know by chance notice a whining sound at any point? It would be very similar to a power steering wine like when the wheels are turning left or right on an older vehicle.

Sent from my LG-G710 using Tapatalk
 

I cant say I have ever noticed a whining that wasn't there from day one.  I always thought my truck shifted weird (hard shifts I guess) also from day one. But how is one supposed to tell if it is normal or not. 

tjaudet829 Enthusiast

tjaudet829

Posted
  • Author
Posted
1 hour ago, JimCost2014 said:

MYC in your RPO codes designates a 6 speed.

 

Let me find the code for the 8 speeds.

MYC-TRANSMISSION, 6 SPD AUTOMATIC

From my build sheet

 

Snowcamo Senior Enthusiast

Snowcamo

Posted
Posted
I cant say I have ever noticed a whining that wasn't there from day one.  I always thought my truck shifted weird (hard shifts I guess) also from day one. But how is one supposed to tell if it is normal or not. 
Ok cool deal

Sent from my LG-G710 using Tapatalk

Ozer Enthusiast

Ozer

Posted
Posted
2 hours ago, Snowcamo said:

Question to The OP.

Did you or the others you know by chance notice a whining sound at any point? It would be very similar to a power steering wine like when the wheels are turning left or right on an older vehicle.

Sent from my LG-G710 using Tapatalk
 

Mine started whining like that few days before it finally went. 

I thought i was dealing with misfires, it drove like that. I changed plugs/wires/coils and still nothing. Turned out to be TC shudder lol Few days later i limped it to the dealer.

Snowcamo Senior Enthusiast

Snowcamo

Posted
Posted
Mine started whining like that few days before it finally went. 
I thought i was dealing with misfires, it drove like that. I changed plugs/wires/coils and still nothing. Turned out to be TC shudder lol Few days later i limped it to the dealer.
Thank you for posting this. I am tallying up the number of people who have heard this sound coming from the trans. It comes from the bell housing area typically. I believe it comes from the converter or pump. Likely the pump tho.
Appreciate it man[emoji106]

Sent from my LG-G710 using Tapatalk

tjaudet829 Enthusiast

tjaudet829

Posted
  • Author
Posted
5 hours ago, Ozer said:

Mine started whining like that few days before it finally went. 

I thought i was dealing with misfires, it drove like that. I changed plugs/wires/coils and still nothing. Turned out to be TC shudder lol Few days later i limped it to the dealer.

I was on Highway with cruise on at 72 and thought my truck was missing as well. A mile or 2 later I exited stopped at light, took off and really had trouble shifting into second. Really never saw 20mph after that. 

Snowcamo Senior Enthusiast

Snowcamo

Posted
Posted
I was on Highway with cruise on at 72 and thought my truck was missing as well. A mile or 2 later I exited stopped at light, took off and really had trouble shifting into second. Really never saw 20mph after that. 

Was it cold outside at the time?

 

Sent from my LG-G710 using Tapatalk

 

 

 

tjaudet829 Enthusiast

tjaudet829

Posted
  • Author
Posted
9 hours ago, Snowcamo said:

Was it cold outside at the time?

 

Sent from my LG-G710 using Tapatalk

 

 

 

Not really cold in the 40's car was warm too, I was prob 15 miles into a trip home from the store.

Snowcamo Senior Enthusiast

Snowcamo

Posted
Posted

Yeah that's cold enough. Mine doesn't start whining and clunky shifts till it gets below 50°f out.

Sent from my LG-G710 using Tapatalk

Snowcamo Senior Enthusiast

Snowcamo

Posted
Posted

Can you look through the grill of your truck and see if you have the active shutters?

Sent from my LG-G710 using Tapatalk

tjaudet829 Enthusiast

tjaudet829

Posted
  • Author
Posted
22 minutes ago, Snowcamo said:

Can you look through the grill of your truck and see if you have the active shutters?

Sent from my LG-G710 using Tapatalk
 

no active shutters.  dealership has had it for 9 days...I have a loaner so I guess I don't care. waiting to hear from them if gm will cover this I guess.

 

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

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

      By Atlas · Posted

      Getting greedy...   The AC pump has been replaced at least once per service records, and it's been recharged twice since 2018 or so, in approximately 2 year intervals between those charges.   It was done at the same shop...clearly they were enjoying the revenue of recharging the system periodically versus actually tracking down and fixing the leak. I learned that the owner was 88 years old when she passed in 2023, so maybe they assumed only a temporary fix was needed anyway.   The system is basically empty now, the compressor spins freely, so I'm guessing it "just needs a recharge".   I vacuumed it down, and it has basically held overnight. Doesn't appear to leak under vacuum, check! So it must leak under pressure. I don't have a way to pressurize the system and pressurizing it with shop air wouldn't be great for the air dryer (which is probably toast anyway?)   The dryer (accumulator? I'm not an AC expert) has a Schrader valve, but the high side has an old ball-type valve, which are notorious for leaking. It's clearly had schmutz blown out of it at one point because the line/area next to the valve is coated old black crud, which I assume is AC refrigerant residue/oil, or maybe even dirty dye. I think I'll roll the dice and replace the valves. I have a black light around here somewhere so I'll find it and shine it around the engine bay in the dark to see if there's any dye.   I can't think of another way to track down the leak other than injecting some dye (if it doesn't have any) and having it charged up. We can't buy R134a off the shelf here anymore, so I'll run it up to Jiffy Lube and have them do it. I think I have a coupon. At the very least, the charge should last long enough for a year or two, according to history. I think this truck will be long gone by then. But cold AC is a selling point.    
    • clowe1243
      6.2L L87 Powertrain Engine Noise (Lifter Failure) Question

      By clowe1243 · Posted

      Got the truck back today.  Called them yesterday to get an update, and miraculously my truck is finished?!?! The $13k out the door was complete bullshit!  Ended up being over $14k.  They added some bullshit service bulletin that I cant even find, where they replaced my radiator without telling me or asking me, and charging me for it.  Need to do more research into it, cause they leaked the first delivered radiator was ran over by FedEX.  Sounds like bullshit to me. 2.5 Months for an engine swap, which ended up being remanufactured, not new; ****ing ridiculous.  Brakes are squishy as hell, not sure if its from sitting.  Will give a couple days to see it that figures it self out.  GAVE IT BACK TO ME WITH 1 GALLON OF GAS!  Just filled the tank the day before drop off, more bullshit.  My dash cam SD card was formatted, not really much I can do about that. 3 year, 100k GM warranty at least.  Time to sell it and say **** off to GM.  Bad experience.  Cant wait for the survey email to come through.  Overpriced Raptor R, here I come!
    • haoleboyZ71
      Radio Update

      By haoleboyZ71 · Posted

      If I forget the phone in the truck, and forget the truck in the phone, and reconnect.  It works great for the day.  Truck sits overnight, and the next day is a no go.  It will connect Android Auto via usb cable, but not bluetooth.   Ive tried Everything in this thread so far, and nothing works for more than a day.   I think I might have to go to the dealer and have them flash the pcm.   thanks for all the suggestions guys. 👍
    • Bill Lemmond
      primary drive belt tensioner

      By Bill Lemmond · Posted

      2022 2500HD Crew Z71 Duramax single alternator.  Recently had the primary (water pump / fan) belt tensioner pulley bearing to fail while hundreds of miles from home of course the plastic pulley melted and belt shredded which took out some wiring. Found a replacement tensioner assembly and belt to continue now would like to find a replacement for just the pulley and bearing to have a spare assembly in case of a repeat, the rest of the tensioner is fine. Has anybody here found a correct replacement part for just the pulley and bearing? Any help is appreciated.
    • Atlas
      Upgrade to a 2026 AT4 with the 3.0L Duramax

      By Atlas · Posted

      +1 for the 3.0   Perfect for 1500 pickup towing duties.   Perfect engine for a 1500 pickup period. Huge torque at stunningly low RPM makes it feel a lot lighter than it is. The fuel mileage is insane for a tall and heavy 1500... 30+ on the highway. Mid 20's around town.   It's probably not perfect if you bought a 6.2 for the braaaaaaapppppp V8 noises and wrapping it out to 6k. The LZ0 acts and sounds like a small turbo diesel and there's nothing you can do to make a small turbo diesel sound like a big one, and you can't make an inline diesel sound like a V8 diesel/big Duramax. It's a different driving experience altogether.   Drive one, I think you'll like it, though...

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...