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02-28-2017, 07:34 PM
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#1
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Senior Member
Join Date: Jan 2017
Posts: 148
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2017 gmc 2500 HD duramax diesel l5p
Has anyone towed with the new l5p diesel if so what tow weight and your opinion of it's capabilities. I have one on order but don't get it till April 2017.
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02-28-2017, 07:44 PM
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#2
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Who Dares, Wins
Join Date: May 2012
Location: Chester County, PA
Posts: 7,063
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Is that a new engine? I have a 2015.5 and it is a beast towing. If it is a brand new engine / design... Good luck. I am sure it will be good but I hate getting the first run of anything.
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Pat, Jen, Heather & Sapphire, the head mouser.
2015 Chevy HD D-Max
2022 Impression 315MB
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02-28-2017, 07:57 PM
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#3
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Senior Member
Join Date: Jan 2017
Posts: 148
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The l5p has been redesigned but with beefed up connecting rods and cooling systems
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02-28-2017, 07:59 PM
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#4
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Senior Member
Join Date: Jan 2017
Posts: 148
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The redesign was to handle the increase torque and horsepower. But we will see.
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03-01-2017, 01:07 AM
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#5
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Senior Member
Join Date: Jun 2012
Posts: 10,907
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Here's what Gale Banks has to say:
2017 6.6L Duramax L5P Diesel Engine
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2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
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03-01-2017, 01:38 AM
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#6
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Who Dares, Wins
Join Date: May 2012
Location: Chester County, PA
Posts: 7,063
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Going in this puppy I see
I want one
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Pat, Jen, Heather & Sapphire, the head mouser.
2015 Chevy HD D-Max
2022 Impression 315MB
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03-01-2017, 05:49 PM
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#7
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Senior Member
Join Date: Nov 2016
Location: Midwest
Posts: 226
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An engineer that works at my plant was going to buy one, but was told they are on a ship hold, and wouldn't sell the one on the lot.
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03-01-2017, 06:01 PM
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#8
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Senior Member
Join Date: Jul 2015
Location: TX
Posts: 236
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Following.....we are buying a Denali dually in the next few months.....
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2016 26RR and a 2018 OR371MBH
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03-01-2017, 07:17 PM
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#9
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Senior Member
Join Date: Jan 2017
Posts: 148
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I ordered my directly from the factory so no hold as far as I know.
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03-01-2017, 07:31 PM
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#10
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Senior Member
Join Date: Nov 2016
Location: Midwest
Posts: 226
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He said the hold was for already manufactured trucks...plus he found a smoking deal on a '16, so he grabbed that.
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03-01-2017, 07:37 PM
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#11
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Senior Member
Join Date: Jan 2017
Posts: 148
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I liked that the full tourqe on the l5p is available in first gear where as others need to shift a gear or two to get to full torque availability.
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03-01-2017, 08:36 PM
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#12
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Member
Join Date: Jan 2017
Posts: 31
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We have sold a few of them already to customers. The feedback I get from them is astounding. They love them compared to their 15's and 16's with the LML. I have done extensive training on the L5P and it is an amazing engine. However, I do know that some were on hold before being delivered to dealers due to "quality control". I cannot elaborate as to why.
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2021 Salem 31KQBTS towed with
2005 GMC Sierra 2500HD Duramax
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03-02-2017, 09:25 AM
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#13
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Senior Member
Join Date: Jan 2015
Posts: 309
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2017 Chevy 3500HD
I have one for about a month. Have only towed my trailer for about 20 miles so far but love it. I got 22 miles per gallon going hiway between KCMO and St. Louis. I'll take that in a one ton any day. City driving I'm averaging 17.5mpg. Love the power. I had to learn to stay off of it. It is very powerful.
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Chip Bruce, RPh
Kansas City, MO
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03-03-2017, 11:04 PM
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#14
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Senior Member
Join Date: Jan 2016
Location: Apollo, PA
Posts: 588
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Quote:
Originally Posted by ChipBruce
I have one for about a month. Have only towed my trailer for about 20 miles so far but love it. I got 22 miles per gallon going hiway between KCMO and St. Louis. I'll take that in a one ton any day. City driving I'm averaging 17.5mpg. Love the power. I had to learn to stay off of it. It is very powerful.
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I'm a little disappointed. I'm barely averaging 14.8 mpg with my '16 F250 PowerStroke when not towing. Love the truck, but I was hoping for a little better mileage. Mileage is about 28 K, so I think it's broken in. 
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2017 Rockwood 2703WS - Sold
2015 Keystone Sprinter 333FWFLS
2017 F250, 6.2 Gas, 3.73 Axle, 2902 lb Payload
If women don't find you handsome, at least they should find you handy!
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03-03-2017, 11:13 PM
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#15
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Who Dares, Wins
Join Date: May 2012
Location: Chester County, PA
Posts: 7,063
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Yeah wow I would have thought better as well. I get 11 up 13 towing at times. Air filter clean? My milage does drop in the winter though from preheating the truck and winter blend. I have also found that 63 (weird number) seems to be the sweet spot for my truck and getting up to 19 on the highway (no towing of course)
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Pat, Jen, Heather & Sapphire, the head mouser.
2015 Chevy HD D-Max
2022 Impression 315MB
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03-04-2017, 07:23 AM
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#16
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Senior Member
Join Date: Jan 2017
Posts: 148
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Won't know till April when I get my l5p. My mechanic recommended to stay away from powerstroke. Cummins is better but the truck is still questionable. We will see later.
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05-02-2017, 07:52 AM
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#17
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Senior Member
Join Date: Jan 2017
Posts: 148
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Quote:
Originally Posted by Rivasiuk
Won't know till April when I get my l5p. My mechanic recommended to stay away from powerstroke. Cummins is better but the truck is still questionable. We will see later.
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Update have 2000 k on my new Denali duramax HD my average mpg has been 15 mpg overall. Mostly city driving. One extended trip of 200 k got 22 mpg. So far pleased with the l5p engine. No towing till Nov when we head to Texas.
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06-11-2017, 07:43 AM
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#18
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Senior Member
Join Date: Jan 2016
Location: Carlisle, Arkansas
Posts: 1,387
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Quote:
Originally Posted by ChipBruce
I have one for about a month. Have only towed my trailer for about 20 miles so far but love it. I got 22 miles per gallon going hiway between KCMO and St. Louis. I'll take that in a one ton any day. City driving I'm averaging 17.5mpg. Love the power. I had to learn to stay off of it. It is very powerful.
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I don't believe you are getting that mileage pulling a heavy 5er, My 2015 RAM get that mileage non towing.
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2015 RAM 3500 DRW 6.7 Cummins 3.42/ Garmin 760RV
40 Gal TransferFlow fuel tank/ TST 507
Amateur Radio W5CI 2019 Days Camping 25
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