Good Sam Club Open Roads Forum: Tow Vehicles: GM 6.6 gas
Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tow Vehicles

Open Roads Forum  >  Tow Vehicles

 > GM 6.6 gas

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev  |  Next
Dadoffourgirls

China, MI USA

Senior Member

Joined: 05/29/2003

View Profile



Posted: 07/26/21 04:40am Link  |  Quote  |  Print  |  Notify Moderator

I had a 2020 Silverado 3500 regular cab dually with the 6.6 gas. I had it for more than a year. I never pulled in mountains, but I did pull a hill from a stop at the bottom with over 15k pounds without a problem. Fuel economy was as stated earlier.

I never felt that the 6 sp transmission impacted performance for me. I have also driven a 2021 3500 Crew with the Duramax. And yes, it did better.

Not sure what I will order after I tow my travel trailer next week to Iowa with my van. I expect that the comfort and trailering capabilities of the new trucks will convince me to place the order.


Dad of Four Girls
Wife
Employee of GM, all opinions are my own!
2017 Express Ext 3500 (Code named "BIGGER ED" by daughters)
2011 Jayco Jayflight G2 32BHDS

Curly2001

Tucson, Arizona

Senior Member

Joined: 09/08/2002

View Profile



Good Sam RV Club Member

Offline
Posted: 07/26/21 08:10am Link  |  Quote  |  Print  |  Notify Moderator

The six speed trans is why I bought a 2019 and not the newer Chevy with the 6.6 gas and the six speed. Also, you can't get a 4:10 rear with that engine/trans in the new trucks. I will keep my 6.0 gasser with the 4:10 diffs until the new trans is offered.
Curly


2019 Chev. Double cab 2500HD, 6.0, 4:10 diffs, six speed auto
2013 Heartland Sundance XLT 265RK

Grit dog

Black Diamond, WA

Senior Member

Joined: 05/06/2013

View Profile


Offline
Posted: 07/26/21 08:45am Link  |  Quote  |  Print  |  Notify Moderator

^Youch! They don’t even offer a 4.10 behind the gasser?
That’s pathetic and enough reason to not buy one for real towing if they have effectively not improved the performance of the truck IMO.


2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29

gmckenzie

BC

Senior Member

Joined: 06/23/2014

View Profile



Posted: 07/26/21 03:48pm Link  |  Quote  |  Print  |  Notify Moderator

I had a bit of bad luck with my truck (2015 Sierra, 1/2 ton) so I had to rent a truck to pull my trailer home.

Ended up with a Chevy 3500 gas and was happy to try it out. 200kms to where the trailer was, averaged 15.8 l/100km, so a bit under 15 mpg through BC terrain. Not great, but not terrible. My truck (5.3L) would do a couple better.

Towing home, ~8,000 lbs, I must say I was underwhelmed. 30 l/100km (~8mpg) and struggled up some of the hills. Figure I gained maybe 5 km/h going up the hills. I expected better.

I'm going to see if I can rent a Ford 7.3 for comparison. Tough to find right now, but I hope to take a short trip, with the worst hill, with the same setup.


2015 GMC Sierra 4x4 CC SB Max Trailer
2010 Cougar 30RKS

ls1mike

Bremerton

Senior Member

Joined: 06/26/2009

View Profile



Good Sam RV Club Member

Offline
Posted: 07/29/21 09:29am Link  |  Quote  |  Print  |  Notify Moderator

Curly2001 wrote:

The six speed trans is why I bought a 2019 and not the newer Chevy with the 6.6 gas and the six speed. Also, you can't get a 4:10 rear with that engine/trans in the new trucks. I will keep my 6.0 gasser with the 4:10 diffs until the new trans is offered.
Curly


Exactly why I have my 17. The 6.6 was not a big enough difference to get into payments. When the offer 4.10s and 8 or 10 speed that is when I will do it.


Mike
2017 Chevy 3500HD 6.0 Crew Cab Long bed
2012 Passport 3220 BHWE
Me, the Wife, two little ones and two dogs.

Grit dog

Black Diamond, WA

Senior Member

Joined: 05/06/2013

View Profile


Offline
Posted: 08/01/21 11:14am Link  |  Quote  |  Print  |  Notify Moderator

gmckenzie wrote:

I had a bit of bad luck with my truck (2015 Sierra, 1/2 ton) so I had to rent a truck to pull my trailer home.

Ended up with a Chevy 3500 gas and was happy to try it out. 200kms to where the trailer was, averaged 15.8 l/100km, so a bit under 15 mpg through BC terrain. Not great, but not terrible. My truck (5.3L) would do a couple better.

Towing home, ~8,000 lbs, I must say I was underwhelmed. 30 l/100km (~8mpg) and struggled up some of the hills. Figure I gained maybe 5 km/h going up the hills. I expected better.

I'm going to see if I can rent a Ford 7.3 for comparison. Tough to find right now, but I hope to take a short trip, with the worst hill, with the same setup.


You hit the nail on the head buddy!
8 mpg is actually decent. You must drive slow though.
I can pull 8 mpg on a 6.0 6 speed gm hd, new 5.3 10 speed or a 6.2 Ford 6 speed with less trailer than you’re pulling, like clockwork.
Never run a new 6.6 gasser yet, but seat of the pants, a 5.0 coyote f150, 5.3 6 or 10 speed Chevy will both tow as well from a power standpoint than a 6.0 4.10 6 speed HD gasser.

Grit dog

Black Diamond, WA

Senior Member

Joined: 05/06/2013

View Profile


Offline
Posted: 08/01/21 11:17am Link  |  Quote  |  Print  |  Notify Moderator

Can get 9mpg towing a 6klb high profile boat (has a tower with a bunch of speakers and stuff on it) at 75mph with a new 5.3 10 speed. Which is 1mpg more than same boat 5.3 6 speed.
For comparison.

Grit dog

Black Diamond, WA

Senior Member

Joined: 05/06/2013

View Profile


Offline
Posted: 08/01/21 11:19am Link  |  Quote  |  Print  |  Notify Moderator

Dadoffourgirls wrote:

I had a 2020 Silverado 3500 regular cab dually with the 6.6 gas. I had it for more than a year. I never pulled in mountains, but I did pull a hill from a stop at the bottom with over 15k pounds without a problem. Fuel economy was as stated earlier.

I never felt that the 6 sp transmission impacted performance for me. I have also driven a 2021 3500 Crew with the Duramax. And yes, it did better.

Not sure what I will order after I tow my travel trailer next week to Iowa with my van. I expect that the comfort and trailering capabilities of the new trucks will convince me to place the order.


Weird news coming from the guy who’s been pimpin vans as awesome tow vehicles….

Dadoffourgirls

China, MI USA

Senior Member

Joined: 05/29/2003

View Profile



Posted: 08/02/21 06:23am Link  |  Quote  |  Print  |  Notify Moderator

Grit dog wrote:

Dadoffourgirls wrote:

I had a 2020 Silverado 3500 regular cab dually with the 6.6 gas. I had it for more than a year. I never pulled in mountains, but I did pull a hill from a stop at the bottom with over 15k pounds without a problem. Fuel economy was as stated earlier.

I never felt that the 6 sp transmission impacted performance for me. I have also driven a 2021 3500 Crew with the Duramax. And yes, it did better.

Not sure what I will order after I tow my travel trailer next week to Iowa with my van. I expect that the comfort and trailering capabilities of the new trucks will convince me to place the order.


Weird news coming from the guy who’s been pimpin vans as awesome tow vehicles….


Ever hear of having more than one vehicle? If the General provides a dually for me to drive, I am going to drive it. If they provide a 3500 Crew, I am going to drive it. Sticker was above $83k on the 3500 Crew. For families, I will always be pimpin a used rental van as a trailer towing value. I purchased less than 2 yrs old and 30k miles for $22k. It is a third of the cost of a pickup.

For somebody who is getting to be an old geezer, and experienced the comfort of a Denali with a Duramax and all the cameras, and can save 20% off a new truck while the public is paying MSRP, there is a potential for a new truck. Additionally, it allows me to help my daughter haul straw and hay.

specta

utah

Senior Member

Joined: 06/18/2001

View Profile



Posted: 08/02/21 07:53am Link  |  Quote  |  Print  |  Notify Moderator

[image]

If I were to buy a new truck today to haul my camper this is what I would buy.
2021 GMC 3500 regular cab 4-wd 6.6 gas with 3.73 gears.
I'll never own a diesel, Ram, extended cab or a crew cab.

My current truck does a great job hauling my 4000 lb TC.
I'd buy a new GM truck in a heart beat.


Kenny
2011 Chevy 2500 HD 6.0L 4wd
1995 Lance 945 Onan QG 2500 LP
Regular cab. The best looking trucks.


Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev  |  Next

Open Roads Forum  >  Tow Vehicles

 > GM 6.6 gas
Search:   Advanced Search

Search only in Tow Vehicles


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2021 CWI, Inc. © 2021 Good Sam Enterprises, LLC. All Rights Reserved.