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Old 07-28-2015, 06:34 AM   #71
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Silerverado 2500 6.0 gas truck left me feeling that it's down on power, compared to the 3/4 ton gas competition from Ford and Ram...
I wasn't impressed with the few V8's I drove lately. Loved the Ford 6.7, but not sure it's the motor we 'need'. It's a monster though and leaves the other trucks I've drove in its dust. The Duramax was very impressive, especially the transmission and almost unpercievable shifting. But it's not as strong as the 6.7 in my casual opinion.

And still leaves the main question I have about whether a diesel is the right choice for us. Driving style, stop and go, in town, not sure diesel is best way to go. In reference to what diesels like, and what driving style might yield best longevity of said motor.

But as I said, the V8's have not thrilled me. Big heavy trucks, I get it. But still. The Ford 6.7 and Chevy/GMC Duramax were far more impressive to me than their gas counterparts. Although I have not seen a Chevy/GMC with 6.2, so no comment on that particular power plant.

There is an interesting way to make a V8 more fun and bridge (or exceed) the gap between diesel and gas truck offerings. Sounds crazy, but it's only twice as much as the diesel option. Basically another step up, assuming the $7-9k diesels are a step up from gassers.

The following can make Tahoes, Suburbans, 5.3 L's, etc 480 HP and Yukon Denali, Silverado with 6.2, etc 560 HP!! $18k with warranty intact.

Giddy up.


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Old 07-28-2015, 08:12 AM   #72
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My 15 Silverado is a Duramax. Just set the cruise and go. Stop and go impacts my mileage more than anything. Otherwise I get 21 driving and 13 towing the 30' Classic.
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Old 07-28-2015, 08:18 AM   #73
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I reviewed Fast Lane Truck's youTube video of the 2015 GM 2500HD with the 6.0 gas and due to the software parameters the truck's transmission would not shift down by itself as they approached the summit. They were at a crawl nearing the top. Of course you can always manually override the transmission to overcome that issue.

The Duramax Denali didn't have this issue in its youTube video and was towing more weight, 12000lbs vs the 6.0 8000lbs for the 6.0.

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Old 07-28-2015, 08:22 AM   #74
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Dan, if you go with a Ford 6.7L diesel opt for the F350 as the F250 6.7 have less than 2000lb payload.

Duramax 2500hd have greater than 2000lb payload and a larger fuel tank if you go with crewcab and 6.5' bed.

Payload seems to be your highest priority.

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Old 07-28-2015, 11:28 AM   #75
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It's been a preoccupation as of late. We are kind of on the bubble it seems.

Regarding the fast lane videos, I saw the Gauntlet, section of miles in Colorado, Ike tunnel. The Chevy 2500 gasser did terrible, it was so hard to get and maintain speed. Just watch the video, it was a turtle. But the weight and all is to be considered, and it escapes me what it was. Took over 10 minutes as I recall.

Same folks at fast lane tested Denali Yukon XL against a Lincoln Navigator, which is a Ford Expedition. Same Gauntlet testing stretch, Ike tunnel, whatever. Lincoln outperformed the Yukon Denali with its big 6.2 L. The Lincoln, as with Expedition, use the Ford Evoboost 3.5 L V6!! It's time was 7 min 30 seconds as I recall.

Interesting.


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Old 07-29-2015, 05:14 AM   #76
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The Silverado 1500 with the 6.2 and 8 speed easily ran the Ike at the speed limit pulling 10k pounds. The 6.2 with the 6-speed did not, which shows the importance of transmission mapping. The real loser in the gas 3/4 Ike runners was the Ram 6.4, which after a certain amount of time at high rpm (where it was doing pretty well), throttled back to 4100 rpm in first gear and went up the final third of the run at 30 mph. The Ford pulled the grade at a steady 5000 rpm.
Forced induction on a truck engine not designed for it, strapped to a heavy load?>"Blown engines I have known." 😁
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Old 07-29-2015, 06:16 AM   #77
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Because we travel a good deal to the Rocky Mountains, there was no question that we would go with a 2500 diesel, in this case a Silverado LT. Our previous Suburban 3/4 ton really struggled in the mountains, I believe, due to the loss of horsepower at altitude. The Duramax is unmatched as a climber. We experience 13-14 mpg towing and about 20 mpg when not.
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Old 07-30-2015, 08:09 AM   #78
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Because we travel a good deal to the Rocky Mountains, there was no question that we would go with a 2500 diesel, in this case a Silverado LT. Our previous Suburban 3/4 ton really struggled in the mountains, I believe, due to the loss of horsepower at altitude. The Duramax is unmatched as a climber. We experience 13-14 mpg towing and about 20 mpg when not.

Duramax is the slowest climber going up the hill as shown in this real world towing comparison. The Ford 6.7 hauls the mail.


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Old 07-30-2015, 09:48 AM   #79
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The Silverado 1500 with the 6.2 and 8 speed easily ran the Ike at the speed limit pulling 10k pounds. The 6.2 with the 6-speed did not, which shows the importance of transmission mapping. The real loser in the gas 3/4 Ike runners was the Ram 6.4, which after a certain amount of time at high rpm (where it was doing pretty well), throttled back to 4100 rpm in first gear and went up the final third of the run at 30 mph. The Ford pulled the grade at a steady 5000 rpm.
Forced induction on a truck engine not designed for it, strapped to a heavy load?>"Blown engines I have known." 😁


I saw that video. Not good. The Cummins they bragged on in its test.
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Old 07-31-2015, 07:52 AM   #80
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What I didn't like about the Cummins in the 5th wheel video was the high pitched noise compared to the Ford and GM. However in the Ram/Cummins pull up to the Ike Tunnel in another FLT video the high pitch noise was absent and the Ram had one of the best times to the summit.

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Old 07-31-2015, 11:35 AM   #81
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I remember very well when ford came out with the 6 litre,
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Old 08-01-2015, 07:45 AM   #82
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I remember very well when ford came out with the 6 litre,

Yes, and I remember the early Chevy diesel engine made from an aluminum gas engine block, so bad that the Better Business Bureau had a special 800 number to arrange for complete new engine replacements. The first 2 years of the Duramax had injector rails so bad that some trucks were out for a month or more waiting on parts. At least Ford isn't called Government Motors (GM). Here's another real world test.


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Old 08-01-2015, 08:30 AM   #83
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The no thanks on bailout is a huge credit to Ford. No doubt.


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Old 08-01-2015, 11:42 AM   #84
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Regarding these race-to-the-top truck comparisons, if you're towing an 20,000# fiver or even bigger, having just a little more power may be meaningful at times.

However, in the "real world" of pulling an Airstream, the difference in power between the new Duramax, Cummins, and Ford diesel engines is not of significant importance. To me, other aspects of the trucks are more meaningful than a minor difference in power output.

Any of these trucks are more than VERY capable for Airstream towing. The race to the top comparisons pulling a monster 20,000# load might make someone think that the fastest truck, beating another by just seconds, is the best truck to buy, which isn't true. There are many more aspects of a truck to base one's buying desicion on than if one gets to the top of the mountain a few seconds faster than another.

If I had no choice but to own & drive any one of these trucks, I'd be fine with that. They're all great, well-built trucks. But having a choice, my favorite is the GMC Sierra Denali HD Duramax/Allison. I'm very proud of Ford for not taking the bailout, but that doesn't sway my buying decision.
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