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5.3L impressed

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Dunn Senior Enthusiast

Dunn

Posted
Posted

i have to say my GMC 5.3 8 speed feels better than my 19 RST 5.3 8spd......i dont know if its a fact, but it feels peppier with better shift points and more power.....i had a 2500 6.6l in between these trucks and am pretty sure GM didnt change anything but it certainly does feel like they refined it......GMC vs chevy idk, and its probably the exact same it just feels different......the whole truck just feels more refined than my 19....weather seals, tightness of door closing, noise, steering, motor, tranny, it just feels like different truck but the same all in one.....

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newdude
newdude

T1 5.3 does drive better than K2.  I own a K2 (tuned and E85) and stock for stock there is a driving difference between them.  I'm sure the couple hundred lbs weight loss helped too but I think the 8

BigMick2023
BigMick2023

No problems here either with my 2020 5.3 8-speed RST CC.......love the engine and no issues with the transmission.  Ride is fantastic IMHO.    Reading this forum one would think the Z71

foghorn23
foghorn23

Don't know if it's better, but the Chevy is fancier than the GMC.  It wears a bowtie everywhere it goes.    LOL

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f8l vnm Senior Enthusiast

f8l vnm

Posted
Posted
50 minutes ago, Dunn said:

i have to say my GMC 5.3 8 speed feels better than my 19 RST 5.3 8spd......i dont know if its a fact, but it feels peppier with better shift points and more power.....i had a 2500 6.6l in between these trucks and am pretty sure GM didnt change anything but it certainly does feel like they refined it......GMC vs chevy idk, and its probably the exact same it just feels different......the whole truck just feels more refined than my 19....weather seals, tightness of door closing, noise, steering, motor, tranny, it just feels like different truck but the same all in one.....

That's easy --GMC>>>>>Chevy

Dunn Senior Enthusiast

Dunn

Posted
Posted
16 minutes ago, f8l vnm said:

That's easy --GMC>>>>>Chevy

maybe so.......i would probably continue to buy GMC over Chevy though from now on after owning both of same trim ( RST vs Elevation) and body style of new T1 gen.....certainly feels like a " tighter more refined" truck for sure

OnTheReel Senior Enthusiast

OnTheReel

Posted
Posted

Goes without saying that there were likely a LOT of small refinements between 19 and 21. Slight tweaks in the manufacturing process and the parts themselves, tuning changes, etc...all done on the fly and without any fanfare. Probably accounts for more of the difference than Chevy vs GMC.

Jav_eee Enthusiast

Jav_eee

Posted
Posted
That's easy --GMC>>>>>Chevy


They’re literally the same.

And my GMC gave me all the problems in less than 10k miles while my Chevy has given me none in over 30k miles.


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f8l vnm Senior Enthusiast

f8l vnm

Posted
Posted
12 hours ago, Jav_eee said:

 


They’re literally the same.

And my GMC gave me all the problems in less than 10k miles while my Chevy has given me none in over 30k miles.


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Did you really take my comment as being serious ? lol I'm very well aware they are the same 

Dunn Senior Enthusiast

Dunn

Posted
Posted
15 hours ago, OnTheReel said:

Goes without saying that there were likely a LOT of small refinements between 19 and 21. Slight tweaks in the manufacturing process and the parts themselves, tuning changes, etc...all done on the fly and without any fanfare. Probably accounts for more of the difference than Chevy vs GMC.

probably so....

Jav_eee Enthusiast

Jav_eee

Posted
Posted
Did you really take my comment as being serious ? lol I'm very well aware they are the same 


You never know these days..


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f8l vnm Senior Enthusiast

f8l vnm

Posted
Posted
20 minutes ago, Jav_eee said:

 


You never know these days..


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fair enough :)  But GMC is still better! 

foghorn23 Senior Enthusiast

foghorn23

Posted
Posted
16 hours ago, f8l vnm said:

fair enough :)  But GMC is still better! 

Don't know if it's better, but the Chevy is fancier than the GMC.  It wears a bowtie everywhere it goes.  :chevy:  LOL

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JR09country Enthusiast

JR09country

Posted
Posted

Just drove a new tahoe with the 5.3 and 10speed and I was very impressed. I know the tahoe gained some weight but it felt as peppy as my inlaws denali xl with the 6.2 and 8speed. Might lose in a flat out drag race but eh thats not going to happen anyways.

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Wiggums Senior Enthusiast

Wiggums

Posted
Posted
On 3/10/2021 at 9:29 PM, SilveradoRST said:

What roughness are you experiencing with the 8 speed?

Extremely jerky in cold mornings. My remedy is to start it from a distance as I walk towards it. Give it about 30 seconds then it's way smoother.

Warm, it's fine.

econometrics Senior Enthusiast

econometrics

Posted
Posted
On 3/13/2021 at 7:03 PM, Wiggums said:

Extremely jerky in cold mornings. My remedy is to start it from a distance as I walk towards it. Give it about 30 seconds then it's way smoother.

Warm, it's fine.

Same here. Whenever I fire mine up, back right out of the driveway and head off, I get a bit of a funky slip in shift from 1-2 about a half block away from home. 

 

2019 5.3L / 8spd in my RST. On the whole, it's a good (not great) transmission. The tuning on it really is excellent, though. As many have said here, it's quick. And noticeably so. 

 

I have 15K on mine in 2 years. I've really only had the harsh 1-2 or 2-1 clunk shifts on this thing maybe 3-4 times. And I've never had the TSB fluid change done on mine, either. 

squ1rrl Enthusiast

squ1rrl

Posted
Posted
On 3/11/2021 at 12:34 AM, spizike9 said:

Someone correct me if I’m wrong but the ‘20 has the 10 speed right? The ‘19 has the 8 speed with the 5.3 but I don’t think the ‘20 does. 

that is correct i have the 2020 sierra slt and it has the 10 speed

Wiggums Senior Enthusiast

Wiggums

Posted
Posted
6 hours ago, econometrics said:

Same here. Whenever I fire mine up, back right out of the driveway and head off, I get a bit of a funky slip in shift from 1-2 about a half block away from home. 

 

2019 5.3L / 8spd in my RST. On the whole, it's a good (not great) transmission. The tuning on it really is excellent, though. As many have said here, it's quick. And noticeably so. 

 

I have 15K on mine in 2 years. I've really only had the harsh 1-2 or 2-1 clunk shifts on this thing maybe 3-4 times. And I've never had the TSB fluid change done on mine, either. 


I had the TSB fluid change done at around 2k miles and asked them to reprogram or reboot it. I know they did it because everything in the computer was reset. It still did the jerkiness. Sometimes if I forget and jump in and shift it to D, the transmission moves too slowly from 1 to 2 and seems to just sit in the middle of the two, causes the rear tires to squeal once it latches on the 2nd gear. Only on cold mornings though, out of habit, I now remote start it a few seconds before getting in. It's a regular occurrence for me.. and I now have around 5k miles on it. Nobody wants to drive it anymore. Mine was built in April 2019 so I assume it's the earlier version. I know it's a lot better now though, even with the 8-speeds. Once it warms up, it's great.

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