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10-02-2016, 08:41 PM
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#1
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3 Rivet Member
2016 30' Classic
The Beautiful Mountains Of Southwest
, Virginia
Join Date: Oct 2014
Posts: 228
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New Duramax In GM Heavy Duties!
General Motors finally announced the much anticipated horsepower and torque ratings for the all new Duramax diesel engine in their new 2017 HD pickups last week, at the opening of the Texas State Fair. Horsepower has jumped to a class leading, 445 and torque has jumped to a second best in class, 910 ft.lbs. All the new diesels will be easily recognized by a new "functional" ram air hood scoop. 90% of the parts, are "all new" in the 6.6L diesel! GM claims that the new engine is the quietest in the segment. Amazingly, all three HD truck manufacturers now offer a diesel engine with 900 or more ft.lbs of torque! Ford-925, GM-910 and Ram-900. In just one years time, Ram went from first to third. All of these new diesels are amazing, compared to what was offered just ten years ago! Smoke em while you have em boys! I wonder who will be the first to hit the "magical 1000 mark?"
__________________
"I won't be wronged. I won't be insulted. I won't be laid a-hand on. I don't do these things to other people, and I require the same from them." John Wayne - "JB Books" 1976.
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10-02-2016, 08:50 PM
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#2
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Rivet Master
2006 23' Safari SE
Biloxi
, Mississippi
Join Date: Nov 2011
Posts: 8,278
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Mileage?
__________________
MICHAEL
Do you know what a learning experience is? A learning experience is one of those things that says "You know that thing that you just did? Don't do that."
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10-02-2016, 09:15 PM
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#3
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Moderator
2015 25' FB Flying Cloud
2012 23' FB Flying Cloud
2005 25' Safari
Santa Rosa Beach
, Florida
Join Date: Jul 2006
Posts: 13,159
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This new version of the Duramax replaces the LML which has been in use since 2011. The new Duramax has been designated as the L5P. The new functional hood scoop is really cool.
I sure hope that they have ironed out the DEF problems of the LML.
Brian
__________________
SuEllyn & Brian McCabe
WBCCI #3628 -- AIR #14872 -- TAC #FL-7
2015 FC 25' FB (Lucy) with ProPride
2020 Silverado 2500 (Vivian)
2023 Rivian R1T (Opal)
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10-02-2016, 09:24 PM
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#4
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Rivets?
1992 29' Excella
2010 22' Interstate
Van By The River
, Georgia
Join Date: Feb 2002
Posts: 2,363
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TheDuke,
Thanks for starting this thread. Should lead to some useful discussion.
Here's a video from The Fast Lane Truck:
__________________
Lucius and Danielle
1992 29' Excella Classic / 2010 Interstate
2005 Chevrolet Suburban K2500 8.1L
2018 GMC Sierra K1500 SLT, 6.2L, Max Trailering
Got a cooped-up feeling, gotta get out of town, got those Airstream campin' blues...
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10-03-2016, 11:20 AM
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#5
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Rivet Master
Currently Looking...
Taos
, New Mexico
Join Date: Oct 2014
Posts: 566
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I think I may need to have one ...
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10-03-2016, 11:43 AM
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#6
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E Pluribus Aluminus
2008 34' Classic S/O
1967 22' Safari
2005 30' Classic
Land Of Enchantment
, New Mexico
Join Date: Aug 2005
Posts: 1,300
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Quote:
Originally Posted by moosetags
I sure hope that they have ironed out the DEF problems of the LML.
Brian
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What sort of DEF problems are there with the LML engine?
__________________
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Jaxon
WBCCI 7005 * AIR 9218
The trouble with trouble is it always starts out as fun...
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10-03-2016, 12:17 PM
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#7
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Moderator
2015 25' FB Flying Cloud
2012 23' FB Flying Cloud
2005 25' Safari
Santa Rosa Beach
, Florida
Join Date: Jul 2006
Posts: 13,159
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Quote:
Originally Posted by Jaxon
.
What sort of DEF problems are there with the LML engine?
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I have a 2011 Chevrolet Silverado 3500 Duramax that I have owned from new. It now has 110,000 miles on it.
I have experienced the "Poor Quality DEF" warning on five occasions over the past five years. Each time we were traveling with the Airstream and went to GM dealers in different parts of the country. These dealers were in California, Utah, Florida, Ohio, and Maine.
As it turned out, none of these warnings were caused by bad DEF. On two of these occasions, the dealer was able to shoot a new code to the truck's system (per GM service bulletins). On one occasion, the dealer replaced NOX sensor #1. On another occasion, the dealer replaced NOX sensor #2. On the most recent occasion (July, 2016), the dealer replaced the DEF pump module.
None of this had anything to do with DEF quality. It was all caused by malfunctioning electronic hardware and software. The first four DEF incidents were covered under the GM 100,000 miles extended diesel warranty. The most recent service, where the DEF pump was replaced, was on my dime as the truck had passed the 100,000 mile mark by then.
This DEF thing has been a giant pain since I have owned this truck, and this is the only problem that I have had with it since new. I started researching DEF problems several years ago. I have read numerous articles on the issue. The consensus of opinion seems to be that the Federal Government forced the manufacturers into this before the technology to monitor the DEF system was ready. Accordingly, DEF problems are not rare on these trucks. Thinking that maybe another brand was better, I have done extensive reading on forums for Ford and Ram diesel trucks. It seems to be the same story industry wide.
Unfortunately, my load situation requires a diesel tow vehicle. A gasoline engine vehicle couldn't handle the load I am carrying. If it could, I think that I would have gone back to a gasoline tow vehicle several years ago.
Brian
__________________
SuEllyn & Brian McCabe
WBCCI #3628 -- AIR #14872 -- TAC #FL-7
2015 FC 25' FB (Lucy) with ProPride
2020 Silverado 2500 (Vivian)
2023 Rivian R1T (Opal)
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10-03-2016, 12:27 PM
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#8
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Rivet Master
2013 31' Classic
billings
, Montana
Join Date: Feb 2010
Posts: 3,577
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More new hype, I will keep my 07 dodge with 6.7 at 110,000 never any problems...
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10-03-2016, 12:59 PM
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#9
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4 Rivet Member
2016 30' International
Quartz Hill
, California
Join Date: Dec 2013
Posts: 356
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I have the same question as AWCHIEF. Horses are hungry and need to be fed.
My 08 Duramax with 155kmiles, 365 hp and 650 ft/lbs of torque pulls my 30 footer just fine. Mileage is 13.5 to 14.5 depending on terrain. My lowest has been 12.0 fighting heavy headwinds.
I am considering purchasing a 2018 Duramax when they are released. So I will be watching the Forums for any info on the 2017 models.
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10-03-2016, 02:16 PM
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#10
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E Pluribus Aluminus
2008 34' Classic S/O
1967 22' Safari
2005 30' Classic
Land Of Enchantment
, New Mexico
Join Date: Aug 2005
Posts: 1,300
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Good info, Brian. So far with our 2015 Chevy Duramax, the only issue with DEF was having to add more on the road while towing the Airstream (and that's a PIA)...
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__________________
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Jaxon
WBCCI 7005 * AIR 9218
The trouble with trouble is it always starts out as fun...
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10-03-2016, 02:26 PM
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#11
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Rivet Master
2008 25' Classic
Full Time
, Texas
Join Date: Nov 2012
Posts: 4,309
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While the DEF tank access is in the engine compartment which makes it difficult to fill it does provide better security. Wish my Ram had a least a locking fuel door. It would be easy to sabotage my diesel or DEF. Kelvin
__________________
2008 Classic 25fb "Silver Mistress"
2015 Ram 2500 6.7L Cummins. Crew Cab, 4x4, Silver
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10-03-2016, 02:33 PM
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#12
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2 Rivet Member
1985 34' Excella
Victoria Harbour
, Ontario
Join Date: Dec 2012
Posts: 32
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Like Bill, I have not had any DEF problems with our 2014 GMC Savana 3500. But the van sees pretty light usage - 55k km or 34k miles.
Other problems such as rotting brake and AC lines, but no DEF issues.
Neil
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10-05-2016, 08:09 AM
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#13
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Moderator Emeritus
1972 31' Sovereign
High Springs
, Florida
Join Date: May 2002
Posts: 2,311
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Wow, the new Duramax engines have more power an torque than Mack trucks had back in the early 80's when I was driving. 300HP and around 900 foot pounds of torque, would pull 80,000 pounds pretty easily.
These new pickup trucks also cost more than a Mack did, too!
__________________
ARS WA8ZYT
2003 GMC 2500HD 4X4 D/A Ext. Cab
Propane Powered Honda EU2000i
Lots of Hot Sauce!
Air # 283
WBCCI 1350
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10-05-2016, 08:19 AM
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#14
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Rivet Master
Currently Looking...
Currently Looking...
Currently Looking...
2022 Atlas
Homosassa
, Florida
Join Date: Nov 2010
Posts: 729
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Our 15 LML hasn't had any of the problems of the first year. We did have a DEF heater issue which will put you in limp mode eventually. Diesel Tech told me he can't reset codes in diesel like he can in gas engined vehicles. EPA is the reason the software will put us in limp mode which could be very dangerous in the remote areas of the country. We have 58,000 miles on our 15 Silverado.
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10-05-2016, 09:04 AM
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#15
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Rivet Master
2013 31' Classic
billings
, Montana
Join Date: Feb 2010
Posts: 3,577
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Quote:
Originally Posted by Pick
Wow, the new Duramax engines have more power an torque than Mack trucks had back in the early 80's when I was driving. 300HP and around 900 foot pounds of torque, would pull 80,000 pounds pretty easily.
These new pickup trucks also cost more than a Mack did, too!
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You got that right, these engines are more like GM'S toro- Flo v8's in the late 1960's and 1970's. They would run easily with the 250 Cummings grossing 80,000 lbs, for one long summer and it was down hill for them after that, 2 years they were done...these are not a heavy duty diesel, these are a light duty engine, I wonder if they still are using the 2 small pins to hold the timing gear to the crankshaft, instead of a key?.....
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