Chevy and GMC Duramax Diesel Forum banner
  • Hey Everyone! Enter your ride HERE to be a part of this months Ride of the Month Challenge!
1 - 20 of 27 Posts

·
Registered
Joined
·
6,775 Posts
Discussion Starter · #1 ·
There is a Silverado reveal video by GM engineering and marketing folks.

Reveals the new interior and the ZR2 trim for the 1500 silverado.

Anyway, at about 11:41 of the video is a screenshot about engine options that shows the new 3.0L/10spd tow rating.

Link should open at about that point of the video.

 

·
Registered
Joined
·
6,775 Posts
Discussion Starter · #4 ·
I thought that I saw somewhere that current production didn't have a higher tow rating because of the cooling system... needs a bigger one to pull more.
Yes.
That was what (I forget the name) someone from GM engineering was quoted as saying when the 3.0L was released.

Perhaps the front end changes have improved airflow enough to get the cooling improvement.
 

·
Registered
Joined
·
99 Posts
"Another big criticism for the 2019 model was the low towing capacity for the 3.0-liter Duramax diesel. Chevy says they were able to make changes to the frame, increase the rear differential to 3.73 (from 3.23) and improve the cooling to allow trucks with this engine to add the maximum towing package. This improves the maximum tow rating to 13,300 pounds in a 2WD model. This is a huge improvement resulting in 4,000 pounds of towing more than the prior generation."
 

·
Registered
2021 3500HD GMC Denali
Joined
·
87 Posts
Yikes, that a lot of weight to be behind a light truck. I would never tow my 37ft bumper pull with a half ton.


Sent from my iPhone using Tapatalk
 

·
Super Moderator
2017 GMC Denali 2500HD, 3.5" Rough Country Lift, 305/55R20 Yokohama Geolandar A/T
Joined
·
2,831 Posts
Yikes, that a lot of weight to be behind a light truck. I would never tow my 37ft bumper pull with a half ton.


Sent from my iPhone using Tapatalk
Your 37ft tt is going to put the half ton over payload anyway with the tongue weight.
 

·
Registered
Joined
·
20 Posts
Yeah, they went to a 3.73. rear end. I wonder the the e-lockers will be available outside the ZR-2 trim? It looks like they upped the size of the 'punkins, so I doubt a retrofit is possible on earlier models

 

·
Registered
2021 3500HD GMC Denali
Joined
·
87 Posts
Your 37ft tt is going to put the half ton over payload anyway with the tongue weight.
Yes sir. Unfortunately some do not look at it that way, even tho my trailer is under the 13300 max trailer reported in those specs, I think that a 2wd model as well.


Sent from my iPhone using Tapatalk
 

·
Super Moderator
2017 GMC Denali 2500HD, 3.5" Rough Country Lift, 305/55R20 Yokohama Geolandar A/T
Joined
·
2,831 Posts
Yes sir. Unfortunately some do not look at it that way, even tho my trailer is under the 13300 max trailer reported in those specs, I think that a 2wd model as well.


Sent from my iPhone using Tapatalk
Yep. I'll be honest, my initial reaction was to mentally figure out if I can get our 39' TT down a few hundred pounds, but there's just no way I could ever get the tongue light enough for it.

I love my 2500 anyway.
 

·
Registered
Joined
·
198 Posts
I believe the 13,000+ lbs trailering is tied to the NHT max tow package. This package you get the 3.73 rear end along with stiffer rear leaf spring and unique shock tuning. The NHT package is only tied to certain tires.

The non-NHT trucks will still have the 3.23. GM needs all FE they can get. They are funding Telsa with buying credits from them.

#iworkforGM
 

·
Registered
Joined
·
198 Posts
An axle ratio change can help powertrain cooling sometimes. When you test at Davis dam or stovepipe wells, a higher rear end ratio can have you maintain a higher vehicle at a lower rpm (you could be in a higher transmission gear). At a higher vehicle speed and lower engine speed, you get more airflow and less heat rejection. This keeps the fluids cooler without needing changes to cooling system.

#iworkforGM
 

·
Registered
Joined
·
44 Posts
An axle ratio change can help powertrain cooling sometimes. When you test at Davis dam or stovepipe wells, a higher rear end ratio can have you maintain a higher vehicle at a lower rpm (you could be in a higher transmission gear). At a higher vehicle speed and lower engine speed, you get more airflow and less heat rejection. This keeps the fluids cooler without needing changes to cooling system.

#iworkforGM
They probably included the new “Flow Tie” on the front end from the ZR2. 😂😂
 

·
Registered
Joined
·
1,998 Posts
Yep. I'll be honest, my initial reaction was to mentally figure out if I can get our 39' TT down a few hundred pounds, but there's just no way I could ever get the tongue light enough for it.

I love my 2500 anyway.
Even if you could, it would probably tow like crap behind a truck with 6- or 8-ply tires. Sway would be a major issue I bet.
 

·
Registered
Joined
·
204 Posts
Doesn’t shock me, my 21 pulls 12k easy even up a steep grade, didn’t do it on purpose internet police, gravel yard overloaded my dump trailer. I think GM downplayed the numbers for some reason on the 20-21’s.
 

·
Registered
Joined
·
20 Posts
The 2021's got a paper upgrade as engineers found out the rear end gears held up much better than expected. It was a modest increase. The 22's have updated chassis and cooling, along with lower final drive ratios to see the big bump in capacity.
 

·
Registered
Joined
·
204 Posts
The 2021's got a paper upgrade as engineers found out the rear end gears held up much better than expected. It was a modest increase. The 22's have updated chassis and cooling, along with lower final drive ratios to see the big bump in capacity.
Do you have the paper upgrade details for the 21’s?
 

·
Registered
Joined
·
20 Posts
I think I read it some months ago on the GM website. They basically looked at run data and concluded they could nudge the max towing a bit based on the info. Try searching GMauthority.com
 
1 - 20 of 27 Posts
Top