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bjr2020 6.2 Enthusiast

bjr2020 6.2

Posted
Posted (edited)
10 hours ago, KARNUT said:

So, the computer is trying to anticipate what your intentions are? ( In the old days) my on board computer would manually down shift if needed. Usually the computer is trying to up shift as fast as possible for fuel mileage. As far as possible bad valve springs. Just drive. If they break get them replaced. That’s probably just too obvious.


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Yea that’s ok lol if your under warranty and don’t have a problem waiting at dealership for them to replace the spring or a new motor. Or better yet it does it when your just off warranty spring breaks valve drops into cylinder. Then you got big $ problems. Hope that doesn’t happen to anyone. Also I do agree with you it seemed older programming would upshift quicker when you let off to achieve better gas mileage and that would be annoying if it was to quickly too. So from what I’ve read just be happy with way my truck is and enjoy it because if updated could only make things worse possibly.

Edited by bjr2020 6.2
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C5 Pete
C5 Pete

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,

Tjeli
Tjeli

This is completely normal behavior.  The TCM holds the gear during "spirited" acceleration until it knows what your intentions are.  It saves having to upshift and then downshift right away again.

bjr2020 6.2
bjr2020 6.2

Yea that’s ok lol if your under warranty and don’t have a problem waiting at dealership for them to replace the spring or a new motor. Or better yet it does it when your just off warranty spring break

Wakinvol Enthusiast

Wakinvol

Posted
Posted

Picked up my 21 TB with the 6.2 last monday...drove it home. 3 days later at 240 miles the valve spring broke.  The local dealership fixed it very quickly but needless to say I was a tad bit upset. Hopefully that's all that happens. 

bjr2020 6.2 Enthusiast

bjr2020 6.2

Posted
Posted (edited)
6 hours ago, Wakinvol said:

Picked up my 21 TB with the 6.2 last monday...drove it home. 3 days later at 240 miles the valve spring broke.  The local dealership fixed it very quickly but needless to say I was a tad bit upset. Hopefully that's all that happens. 

Mines been rock solid so far. 7/2020 build I was hoping gm had this worked out by now too. It’s the vendors I think that are providing the part I’m thinking are subpar. I think ? I read or heard that gm replaces the whole bank on the side that broke.

Edited by bjr2020 6.2
steelcity Enthusiast

steelcity

Posted
Posted (edited)
36 minutes ago, BlaineBug said:

L83 5.3 not affected, I'm relaxed.

Is that what the 5.3 is? L83?  What is the L-82, L-84 and L8T?

 

Isn't the L-82 5.3 in the trucks now?

https://gmauthority.com/blog/gm/gm-engines/l82/

 

Or is the L-84 5.3 in the trucks now?

https://gmauthority.com/blog/gm/gm-engines/l84/

Edited by steelcity
BlaineBug Enthusiast

BlaineBug

Posted
Posted (edited)
31 minutes ago, steelcity said:

Is that what the 5.3 is? L83?  What is the L-82, L-84 and L8T?

 

Isn't the L-82 5.3 in the trucks now?

https://gmauthority.com/blog/gm/gm-engines/l82/

 

Or is the L-84 5.3 in the trucks now?

https://gmauthority.com/blog/gm/gm-engines/l84/

Actually I just searched really quick, the L-82 AND L-84 appear to be newer than the L-83 and both are 5.3  However the L-82 was put into the 2019+ Silverado, Sierra.  Perhaps 2020+ Yukon, Tahoe, Suburban since they share the same redesign styling too?  Also it seems as though the L-82 has active fuel management and L-84 has dynamic fuel management, which is capable of operating on only 2 cylinders.  Active fuel management only switched between 4 and 8, or 4 and 6 if you had a V6 4.3 liter.

L-83 was the 5.3 used pre-2019 for trucks and pre-2020 for SUVs.

The L8T is a 6.6 liter.

Edited by BlaineBug
steelcity Enthusiast

steelcity

Posted
Posted (edited)
4 minutes ago, BlaineBug said:

Actually I just searched really quick, the L-82 AND L-84 appears to be "newer" than the L-83 and both are 5.3  However the L-82 was put into the 2019+ Silverado, Sierra.  Perhaps 2020+ Yukon, Tahoe, Suburban since they share the same redesign styling too?

L-83 was the 5.3 used pre-2019 for trucks and pre-2020 for SUVs.

The L8T is a 6.6 liter.

So what 5.3 is in the 19/20 Silverado?Sierra now? I'm really confused now, lol

 

I think it is the L-84

https://www.onallcylinders.com/2019/07/25/l84-5-3l-ecotec3-engine-specs-performance-bore-stroke-cylinder-heads-cam-specs-more/

Edited by steelcity
BlaineBug Enthusiast

BlaineBug

Posted
Posted (edited)
2 minutes ago, steelcity said:

So what 5.3 is in the 19/20 Silverado?Sierra now? I'm really confused now, lol

I'm sorry for the garbled information.

The L-82 5.3 was used in the 2019+ Silverado and Sierra with the 8 speed transmission and active fuel management.

The L-84 5.3 was used in the 2019+ Silverado and Sierra with 10 speed transmission and dynamic fuel management.

 

It would be my best guess that the L84 5.3 is the engine used in 2020+ Yukon, Tahoe, and Suburban.

Edited by BlaineBug
steelcity Enthusiast

steelcity

Posted
Posted (edited)
1 minute ago, BlaineBug said:

I'm sorry for the garbled information.

The L-82 5.3 was used in 2019+ Silverado and Sierra with the 8 speed transmission and active fuel management.

The L-84 5.3 was used in the 2019+ Silverado and Sierra with 10 speed transmission and dynamic fuel management.

 

It would be my best guess that the L84 5.3 is the engine used in 2020+ Yukon, Tahoe, and Suburban.

I have a 5.3 with 10 speed so I guess mine is a L-84. And it was built right in the middle of the dates reported

Mine is a 2020  Sierra AT4

Edited by steelcity
BlaineBug Enthusiast

BlaineBug

Posted
Posted
1 minute ago, steelcity said:

I have a 5.3 with 10 speed so I guess mine is a L-84. And it was built right in the middle of the dates reported

Mine is a 2020  Sierra AT4

According to GM Authority you should based on their application chart.

Dynamic fuel management has 17 cylinder patterns whereas active fuel management has 2.  DFM operates on less than 8 cylinders 9% more often than AFM according to their press release from May of 2018.

BlaineBug Enthusiast

BlaineBug

Posted
Posted (edited)

5.3 L82 https://gmauthority.com/blog/gm/gm-engines/l82/ (6 speed transmission, active fuel management.)

5.3 L83 https://gmauthority.com/blog/gm/gm-engines/l83/ (8 speed transmission, dynamic fuel management.)

5.3 L84 https://gmauthority.com/blog/gm/gm-engines/l84/ (8 speed transmission, dynamic fuel management.)

6.2 L87 https://gmauthority.com/blog/gm/gm-engines/l87/ (10 speed, dynamic fuel management.)

Application tab is there to check years and models.

 

PS - Any 2019+ Silverado and Sierra with a 6 speed transmission will have the L82 engine also, according to GM Authority.  It's odd that their application list doesn't include prior years.

Edited by BlaineBug
steelcity Enthusiast

steelcity

Posted
Posted
6 minutes ago, BlaineBug said:

5.3 L82 https://gmauthority.com/blog/gm/gm-engines/l82/ (6 speed transmission, active fuel management.)

5.3 L83 https://gmauthority.com/blog/gm/gm-engines/l83/ (8 speed transmission, dynamic fuel management.)

5.3 L84 https://gmauthority.com/blog/gm/gm-engines/l84/ (10 speed transmission, dynamic fuel management.)

Application tab is there to check years and models.

 

PS - Any 2019+ Silverado and Sierra with a 6 speed transmission will have the L82 engine also, according to GM Authority.  It's odd that their application list doesn't include prior years.

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!

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