Stop sale on 6.2l vehicles

BlaineBug · December 10, 2020

7 minutes ago, steelcity said:

I clicked on the application tabs for the L-84 and it doesn't even list the 10 speed, just 8 speed, lol.

I have to have the L-84 though, thanx!

Well what the heck. I was just looking at something and it showed the 10 speed with the L84.

EDIT - it was the 6.2 L87 that lists 10 speed https://gmauthority.com/blog/gm/gm-engines/l87/

I'm not seeing anything on GM Authority that lists the 10 speed with any 5.3!?!?

Edited December 10, 2020 by BlaineBug

steelcity · December 10, 2020

22 minutes ago, BlaineBug said:

Well what the heck. I was just looking at something and it showed the 10 speed with the L84.

EDIT - it was the 6.2 L87 that lists 10 speed https://gmauthority.com/blog/gm/gm-engines/l87/

I'm not seeing anything on GM Authority that lists the 10 speed with any 5.3!?!?

https://gmauthority.com/blog/2020/08/2020-gmc-sierra-1500-gets-transmission-downgrade-exclusive/

https://thenewswheel.com/2020-gmc-sierra-1500-drops-transmission-option/

Looks like the 5.3 -10 speed combo isn't offered anymore

Edited December 10, 2020 by steelcity

redwngr · December 10, 2020

They are using both the L82 and L84 5.3's

Base trims use the AFM L82 5.3L (sierra base truck and chev WT Custom and Custom TB use this motor)

Other trims use the DFM L84 5.3L

L87 is the 6.2 DFM

LV3 is the I4 2.7 turbo

L3B is the V6 4.3L AFM

LM2 is the I6 dmax in the 1500

LT8 is the new 6.6L gas in the HD's

L5P is the 6.6L Dmax in the HD's

6 engines in the 1500's

2 engines in the 2500/3500

5.3L with 10speed is still available on sierra (but combo is not currently available on silverado)

On Sierra:

MQB Transmission, 10-speed automatic, electronically controlled with overdrive and tow/haul mode. Includes Cruise Grade Braking and Powertrain Grade Braking
On SLE and Elevation - Available on 4WD models equipped with (L84) 5.3L EcoTec3 V8 engine. Included and available with (LM2) Duramax 3.0L Turbo-Diesel I6 engine.
On SLT - Available on models equipped with (L84) 5.3L EcoTec3 V8 engine. Included and only available with (L87) 6.2L EcoTec3 V8 engine or (LM2) Duramax 3.0L Turbo-Diesel I6 engine.
On AT4 - standard (AT4 can have 5.3L. 6.2L or the 3.0L)

On Denali - Included and only available with (L84) 5.3L EcoTec3 V8 engine on 4WD models, (L87) 6.2L EcoTec3 V8 engine or (LM2) Duramax 3.0L Turbo-Diesel I6 engine.

BlaineBug · December 12, 2020

I apologize - I should have consolidated all of the information from GM Authority into just one single post. I also don't think GM Authority application information is accurate, as mentioned the 5.3 and 10 speed is only a Sierra option but isn't listed as such at all at GM Authority.

Edited December 12, 2020 by BlaineBug

C5 Pete · December 12, 2020

The day I bought my 2020, I drove from Orlando, to Savannah. The next day, drove home to So Jersey. So, a bit more than 4.5 hours run time...

So far, with 7000 miles on it in 3 months, no issues... Now, where's that piece of wood??

Anakalypto · December 22, 2020

My 2019 with a 6.2L and 10spd has just over 26k on, pulling 35x12.50s for most of its life. No issues at all, love this truck.

The anti-lock brake issue was a pain. I have a few seat squeaks that I’m chasing. Otherwise it’s been rock solid. Half those miles have been pulling a 24’ pontoon, or trailer loaded with ATVs.

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M1ck3y · December 24, 2020

On 11/30/2020 at 12:17 PM, newdude said:

Yep. Valve spring failure test for 6,000 vehicles with a 6.2 engine. N202319660 Valve Spring Failure

Techs are instructed to hook up a laptop and via GM GDS2 set the throttle to 2,000rpm and leave it running for 4.5 hours, checking it every 25 minutes or sooner. During the test, they have to watch for any leaks, misfires, abnormal valve train noise and check engine light. If it fails during the test, they have to call GM TAC to proceed with what to do to fix it. If it passes the 4.5 hour run, they then take it on a 10 mile test drive in manual mode, keeping the engine at 2000-3500rpm. If that passes, change the oil and ship it/put it back on the lot.

Wow, that's ridiculous. Why not just replace the valve springs? It has got to be cheaper then all that testing. Plus your adding mile's with wear and tear on a new truck. Not to mention it could blow and cause further damage. Lol, who the heck is running gm these days?

BlaineBug · December 24, 2020

38 minutes ago, M1ck3y said:

Wow, that's ridiculous. Why not just replace the valve springs? It has got to be cheaper then all that testing. Plus your adding mile's with wear and tear on a new truck. Not to mention it could blow and cause further damage. Lol, who the heck is running gm these days?

They probably pay a tech 30 minutes versus 8 hours or whatever a valve spring replacement will cost.

Is it that they don't know which springs will fail and which won't? Some springs good some springs bad?

OnTheReel · December 25, 2020

They sure won’t preemptively tear apart and swap springs on every engine on the lot. Have you seen the window thread? Deal with it when it fails is the name of the game.

newdude · December 26, 2020

On 12/24/2020 at 5:36 PM, M1ck3y said:

Wow, that's ridiculous. Why not just replace the valve springs? It has got to be cheaper then all that testing. Plus your adding mile's with wear and tear on a new truck. Not to mention it could blow and cause further damage. Lol, who the heck is running gm these days?

Costs them a LOT more $$$$ to do that. The point of the test is to have it blow, if its going to blow, on the dealer's lot and not while a customer is on a 500 mile trip to see grandma.

4.5 hours of run time at 2500rpm is nothing compared to what GM puts these engines through during powertrain validation. 24 hours at WOT on an engine dynamometer that is simulating a full trailer load up a 6% grade. It can handle 4.5 hours of elevated RPMs in a parking lot.

BlaineBug · December 26, 2020

Why don't the springs fail on the powertrain validation? Or not all new engines are tested? Random sampling?

Whiskeyranch · December 26, 2020

Had my 2021 6.2 Trail Boss stall on me after owning it for less than 24 hours. Only 197 miles on the clock. 28° outside and had to wait for 3 hours to get a tow back to the dealer. They noticed a failed spring immediately. Tech said he’ll replace it and it’ll be done Monday. I said nope, you need to replace all 16. I talked to the service manager and he seemed on board. I later said to check the cylinder with a borescope to look for scoring on the cylinder wall. Guess I’ll find out Monday. Talk about a roller coaster of emotion that day. What a pain.

Edited December 26, 2020 by Whiskeyranch

KARNUT · December 26, 2020

I’m a big fan of GM small blocks. This is not the first time of a parts problem. I’ve owned a few with weak cams and noisy value trains. How about the 5.7 diesel, probably the biggest GM pr debacle ever. I know many people who left GM over that one. The funniest I can think up is Chevy small blocks in Oldsmobiles. I was a Napa counter guy for a few months in the early 80s. Do it yourselfers working on their parents- grandparents olds doing plug changes. What engine is in your olds would bring the angry there better not be a Chevy engine in my olds. I’m gonna sue.

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dieselfan1 · December 26, 2020

I’m a big fan of GM small blocks. This is not the first time of a parts problem. I’ve owned a few with weak cams and noisy value trains. How about the 5.7 diesel, probably the biggest GM pr debacle ever. I know many people who left GM over that one. The funniest I can think up is Chevy small blocks in Oldsmobiles. I was a Napa counter guy for a few months in the early 80s. Do it yourselfers working on their parents- grandparents olds doing plug changes. What engine is in your olds would bring the angry there better not be a Chevy engine in my olds. I’m gonna sue.

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Wasn't that motor an Oldsmobile in the trucks?
My dad ordered one as soon as he heard about them coming out. 1980 Silverado trim 5.7 diesel. Square headlights. That truck was the schitt then.
Lost an injector within the first 500 miles. Otherwise it was a decent truck. You could only tow a fishing boat with it though. It did get good mileage also. Better than the 10 mpg all the other 350's got.
The main reason he bought it was he worked for a sewer and water contractor. They had tanks of diesel on the job sites for the equipment. He would run off road diesel fuel in it for free.
You'd go to jail for that nowadays.

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KARNUT · December 26, 2020

Wasn't that motor an Oldsmobile in the trucks?
My dad ordered one as soon as he heard about them coming out. 1980 Silverado trim 5.7 diesel. Square headlights. That truck was the schitt then.
Lost an injector within the first 500 miles. Otherwise it was a decent truck. You could only tow a fishing boat with it though. It did get good mileage also. Better than the 10 mpg all the other 350's got.
The main reason he bought it was he worked for a sewer and water contractor. They had tanks of diesel on the job sites for the equipment. He would run off road diesel fuel in it for free.
You'd go to jail for that nowadays.

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GM olds small block. We had 3 Oldsmobiles with them, all headaches.

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