6.6 Duramax or 6.0 gasser? in 3/4 ton.

[geeman]

Thinking I want to upgrade from my '05 GMC Sierra Z71 Crew Cab and towing a 2012 Keystone 28RBS(31 footer). Tows OK going down the highway but shifts down and revs like crazy on the interstate driving. Since I would like to get some longer trips in, we are thinking of a 3/4 ton crew cab. Only get about 3-7,000 miles annually right now.

What do you suggest/recommend and why as far as Gas vs Diesel? Would like to stay above 2006 but thinking below the emissions in the '08, '09+ area.

Thanks

[SAABDOCTOR]

On Thanksgiving eve you want to start a which truck is better war your a brave man. There are good and bad to all of them. as to which gas or diesel that has is points too. pulling a 5er torque is king diesel is the front runner for that. But i comes at a premium. costs more for some reason in the us fuel cost more... bohica! there are people here that tow with a gasser and have no issues same with the diesel. me i prefer diesel. one plus side of a newer dielsel is they are not as loud as the older ones. i get 15mph towing from ct to quebec. But the important part is you and the DW need to like what your driving. so my advice is spend some time driving the different trucks and pick what you like best and what fits your needs. good luck and enjoy thank a latke!

[tdawg]

I would go with the 6.6 don't think you would be happy with the gasser unless you don't pull long distance or in steep hills. I have a 454 pulling a 3535 Alpine i will not go out west with it on steep grades. Next purchase is diesel.

[f6bits]

I'd suck it up and get a diesel. Then totally enjoy it.

[gearhead]

I just got home from trading my GMC 2500HD 6.0 gasser in on a slightly used 2013 Ford F350 6.7 oil burner.

[Bluewater]

I am very pleased with my 8.1 liter 496 cubes gasser pulling our 5er. On long steep hills the diesels do pull a little better but that is a very small instance compaired to the long trip. For ease of service I have no problem with a gasser. each to his own

[Albert]

I think my trailer may be a little heavier then yours. I pull it with a 2012 F250 6.2 gas. I live in the west and have pulled it several times over the cascade passes without any problems. Pulls over Mt. Hood at 50 MPH. I could have gone faster but do not like to push it.

I decided on the gas due to the fact that I just could not justify paying the extra cost for the diesel when my RV was not that heavy. If I were pulling something that was 9,000 lbs or great I would have purchased the diesel.

With that said, if money were no object I would have a F550 diesel.

[Ken / Claudia]

Do not test drive a oil burning tubro charged truck, cause than you will need one. The upside to cost is they resale higher than the gassers. That was not true before tubros arrived.

[therink]

My fiver is 12k loaded and I tow with 6.0 gasser with 4:10 axle. See truck in sig below. I also could not justify cost for oil burner in my case. I tow maybe 3000 miles per camping season and through moderate hills here in upstate NY. I have no complaints. If going GM gasser HD, make sure you get 4:10 axle to maximize the gasser abilities, especially if towing 9000 lbs or more.
Steve

[Hoojs12840]

Almost every truck I've seen that has a tuner also has to have work done to it, injectors, transmissions, turbos, fuel rails. Of course it could be those owners are trying to get sportscar numbers out of machine designed to tow and haul, thus causing premature wear.

I do know this, a unmodified duramax brings stupid money, while one that's been "upgraded" is much harder to sell.

I have DEF on mine and I get 23mpg highway, 17 city with no trailer. I get 12mpg towing a 12500# fifth wheel. Bone stock.

I spent a lot of time reading the duramax forums and all those guys are constantly fixing things after altering it.


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[kellydog98]

No question, Diesel is the way to go. Had the Chevy 8.1 gasser and we watched the mile per gallon in the fuel display. Now it's a 6.6 Duramax with Allison Tranny. Happy Pulling for sure.

[chuckster57]

I went from an F250 with a 460 on steroids to an F350 DRW with a turbo'd IDI.

From 7 MPG and not able to use A/C for fear of overheating, to 11MPG and A/C blasting in 100 degree weather....DIESEL is the way to go.