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Any updates to GM researching on how to improve the towing capability of the 3.0L Duramax??

beauso79

By beauso79
in Modifications, Wheels & Tires

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topgear1224 Enthusiast

topgear1224

Posted
Posted

GM is always focused on ease-of-use. that's why for the longest time they have the lowest tow rating of the duallys

but the difference was is when you max them out to their limit they performed much better than any of the others at their claimed max.

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Transient Senior Enthusiast

Transient

Posted
Posted
Keep in mind GM is ultra conservative trailer waiting and has pushed for an industry standard with no luck.  The ratings are established based up the capability of a 7% grade on I70 called Ike Gauntlet.  Look it up.  Not saying you should exceed the Published recommendations, but be informed how they are established.
Give credit where credit is due. GM isn't running the Ike Gauntlet. That's The Fast Lane Truck on YouTube. And, TFL Truck praises the GM 3.0 Duramax over Ford and Ram.

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  • 2 weeks later...
topgear1224 Enthusiast

topgear1224

Posted
Posted
Pewterliftedz The trailer weight of the 1500 3.0 diesel drops to 7100 lbs for a gooseneck.
Payload limited, gooseneck is rated with a much higher tongue weight percentage than conventional. Per SAEdfd63c04267581e53c90884a73a751e4.jpg

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Bluvalentine Enthusiast

Bluvalentine

Posted
Posted

topgear1224: tongue weight conventional = 10%; gooseneck = 15%. But the diesel looses 3,300 lbs of trailer weight on the gooseneck? Why? I always thought you could haul more on a gooseneck than bumper pull? The weight limits seem reversed to me.

Bluvalentine Enthusiast

Bluvalentine

Posted
Posted

My GOOSENECK horse trailer with gear and 3 horses weighs approximately 7,500lbs. Can I safely tow it with the 1500 diesel?

topgear1224 Enthusiast

topgear1224

Posted
Posted
topgear1224: tongue weight conventional = 10%; gooseneck = 15%. But the diesel looses 3,300 lbs of trailer weight on the gooseneck? Why? I always thought you could haul more on a gooseneck than bumper pull? The weight limits seem reversed to me.
Maybe cross member strength, or it failed the SAE handling test (gooseneck has an awfully high CG compared to bumperpull).

Ultimately I would guess it's limited by handling, the rear is too soft and the sway bar too tiny.

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Transient Senior Enthusiast

Transient

Posted
Posted

I look at a lot of the questions in this thread and wonder if people are aware of the sticker at the bottom of B pillar on the driver's side

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pewterliftedz Enthusiast

pewterliftedz

Posted
Posted (edited)
On 9/16/2020 at 9:21 AM, Bluvalentine said:

My GOOSENECK horse trailer with gear and 3 horses weighs approximately 7,500lbs. Can I safely tow it with the 1500 diesel?

Depending on length of trailer and how the trailer is loaded, you’ll be over on tongue weight with a 7,500lb gooseneck.  If it’s more than just you and a full tank of diesel, you’ll probably exceed the trucks GVWR and rear axle too.  The max Goose tongue weight is 1080lb on my truck 

D1FB2148-CFE6-47D6-98B1-14B2B9B107F2.jpeg

Edited by pewterliftedz
Bluvalentine Enthusiast

Bluvalentine

Posted
Posted

I decided the 3.0 diesel was not a safe bet to haul my trailers, so I have purchased a 2020 2500 HD with the 6.6 gas engine. It won't get much better mileage than my 2005 2500 HD 6.0 gas, but I won't have to worry about towing.

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