GM 6.6 gas

[poorboy]

Who's towing what with the new 6.6 gas from GM. How does it do in mountains, how much weight are you pulling, what kind of mileage towing and empty. You all have the real answers, I thank you for your input.

[Grit_dog]

Dadoffourgirls wrote:

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.

Yup, I understand the concept. Have a few different vehiculars myself. But you’re the one who said the comfort and towing ability make convince you to buy one (presumably in place of your short bus)

[specta]

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.

[Dadoffourgirls]

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.

[Grit_dog]

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….

[Grit_dog]

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]

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.

[ls1mike]

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.

[gmckenzie]

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.

[Grit_dog]

^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.

[Curly2001]

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

[Dadoffourgirls]

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.

[Sjm9911]

LITEPHIL wrote:

Sjm9911 wrote:
I would wait untill they fix the bugs in the ford. Guy at work bought one and it was in the shop for like 2 months, he just got it back. One sensor after another kept failing. Maybe bad luck , but who knows.

I think we're talking about the GM 6.6 here

Well I did post on that first, maybe you read the comment above?

[Grit_dog]

I driven one bobtail and it was a nice truck. Bout what you’d expect.
But if you’ve been truckin for 38 years, I believe you already know the answer.
Your LML will still blow the doors off it, towing. And it is the least powerful worst trans of the big 3 gassers.
And the Chevys are ugleeee!

[LITEPHIL]

Sjm9911 wrote:
I would wait untill they fix the bugs in the ford. Guy at work bought one and it was in the shop for like 2 months, he just got it back. One sensor after another kept failing. Maybe bad luck , but who knows.

I think we're talking about the GM 6.6 here