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GMC Duramax

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GMC Duramax

Postby UT-longbeard » Tue Mar 05, 2019 8:05 am

I’m looking to purchase a new GMC Duramax soon. Any recommendations on what dealers in TN or out of state I should look at? The Nashville area dealers are pretty proud of their price compared to others.

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Re: GMC Duramax

Postby jlanecr500 » Fri Mar 08, 2019 9:15 pm

I had one in 06 and was pleased. I tried to get a deal in 17 and the prices were stupid. I bought a 17 Ram and found that the Duramax engine doesn't hold a candle to the Cummins.
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Re: GMC Duramax

Postby lungpuncher1 » Sun Mar 17, 2019 11:54 pm

I had an 06 lbz and loved it. Spent too much money on it (twin turbos, built transmission, 700rwhp) but I loved that truck. Now I wouldn't buy another gm product. I had a gmc sierra 1500 and it fell apart from the inside out. Quality was horrible and I'm done with them. Just my opinion.

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Re: GMC Duramax

Postby Andy S. » Mon Mar 18, 2019 4:32 am

jlanecr500 wrote:..... the Duramax engine doesn't hold a candle to the Cummins.
I'm not a diesel guy, but this is what I hear from my buddies that are.
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Re: GMC Duramax

Postby ImThere » Mon Mar 18, 2019 6:10 am

Andy S. wrote:
jlanecr500 wrote:..... the Duramax engine doesn't hold a candle to the Cummins.
I'm not a diesel guy, but this is what I hear from my buddies that are.

And I will add I hear neither come even close to the newer Ford 6.7. I work with several diesel owners they all say the same thing.


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Re: GMC Duramax

Postby Andy S. » Mon Mar 18, 2019 6:58 am

ImThere wrote:
Andy S. wrote:
jlanecr500 wrote:..... the Duramax engine doesn't hold a candle to the Cummins.
I'm not a diesel guy, but this is what I hear from my buddies that are.

And I will add I hear neither come even close to the newer Ford 6.7. I work with several diesel owners they all say the same thing.
I assume you are talking about horsepower? It is hard to bet against a Cummins for longevity and reliability as a workhorse.
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Re: GMC Duramax

Postby jlanecr500 » Mon Mar 18, 2019 11:33 pm

ImThere wrote:
Andy S. wrote:
jlanecr500 wrote:..... the Duramax engine doesn't hold a candle to the Cummins.
I'm not a diesel guy, but this is what I hear from my buddies that are.

And I will add I hear neither come even close to the newer Ford 6.7. I work with several diesel owners they all say the same thing.


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I'm sure the Ford is rated higher than the Cummins but we're not at the drag strip and most of us are not towing max loads every day. The new Cummins is rated higher than my 17. If you have to run an engine at or near full throttle to do the job, you just plain need a bigger truck. I'm a Chevrolet guy at heart and enjoyed the Duramax I had in 06. It was over 400hp and 800ftlb of torque and did a good job. I especially liked the Allison transmission. Building transmissions on the side, I know a stout trans when I see one. What I didn't like is how the grade braking works. If your speed increases on a downhill with no throttle applied, the tranny controller starts gearing down. I've seen the Duramax near 5000 rpm in grade braking. A stock diesel at 5 grand? That is crazy.

The Cummins under the hood of my RAM is a akin to a Timex. An in-line 6 with a rev limit of 3000 rpm, making max torque at 1800 rpm's is a torque monster. The v-8's have to rev more and obviously won't last as long. Sure, I don't like the trans as well but I'll take the trade-off.

As for the Ford, I guess I'll never know...
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