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Old 01-30-2017, 05:21 PM   #1 (permalink)
JasonsDMax
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Alternator options on 2017 L5P's (and snowplow prep pkg?)

Seriously considering purchasing or ordering a 2017 L5P 3500HD to replace my '06 LBZ. They come with a single 150 amp alternator, but it's an option to upgrade to a 220 amp, or dual 150 amp and 220 amp. Is there a good reason to (or not to) upgrade to the larger 220 amp or the dual set-up?


Another consideration: Ordering the snow plow prep package gives you the 220 amp alternator, in addition to a slightly beefed up front suspension. Not sure what exactly is changed with the front suspension with the snow plow prep package. Anybody have knowledgeable opinions on these questions?

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Old 01-30-2017, 05:32 PM   #2 (permalink)
Randu
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I plan on doing a lot of 5th wheel towing and upgraded to the 220 amp alternator. $ 150 upgrade. I've had my 3500 for 3 weeks and so far very nice. My 2017 replaced a 2014 and big differences. You changing from a 2006 will be huge!! My opinion is don't get a plow package unless you plan on plowing. No real need to beef up the front for most uses other than plowing. Randu

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Old 01-30-2017, 11:38 PM   #3 (permalink)
MRBASS
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As I understand it, when you get the duramax 3500hd, you get the upgraded torsion bars and axle already, just not the rating? That's what I was told..

I got the 220 amp alternator, money well spent!! my winch on my trailer runs faster and my battery is not drained after running the winch for about 15-20mins.. high idle switch helps too...!!
my lmm batteries, after winching a car up on the trailer, gauge on dash would be way over to the right charging like a mofo. That was a 150amp, if I am not mistaken..that didn't happen with the 220 amp alternator now.
Only used the trailer winch twice so far, but better for sure..
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Old 01-31-2017, 04:40 AM   #4 (permalink)
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I had the dual setup on my 06, ordered it that way for redundancy, thought being if one ever failed, I wouldn't be left stranded. Overkill I know, but for the money, maybe not so much? If I was to order one today I would go with the dual setup again.

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Old 01-31-2017, 12:18 PM   #5 (permalink)
redwngr
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Quote:
Originally Posted by MRBASS View Post
As I understand it, when you get the duramax 3500hd, you get the upgraded torsion bars and axle already, just not the rating? That's what I was told..
From the spec charts "It depends" on more than just if 2500 or 3500.

In some combos they both have 5600# spring rating, some both have 5200# and some it changes.

4wd cc std box dmax:
2500 - 5200#
3500 - 5600#

4wd cc long box dmax:
2500 - 5600#
3500 - 5600# (srw or drw)

2wd cc long srw
2500 - 5200#
3500 - 5200# (the drw is 5600#)

All reg cab 4wd 2500/3500 dmax have 5200#
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Old 02-01-2017, 05:48 PM   #6 (permalink)
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Does the actual spring change, or just the rating?
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Old 02-01-2017, 07:54 PM   #7 (permalink)
redwngr
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Quote:
Originally Posted by MRBASS View Post
Does the actual spring change, or just the rating?
Strangely enough, at one time I worked for a supplier of GM torsion bars.

At the time, there were many different bars for the variety of different spring rates. I'd assume that is still true today.
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Old 04-06-2017, 02:21 AM   #8 (permalink)
Micheal Tomac
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I thought the 2017 2500HD and 3500 Diesel trucks with the snow plow prep package came with #6000 torsen bars
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Old 04-06-2017, 07:14 PM   #9 (permalink)
JasonsDMax
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Quote:
Originally Posted by Micheal Tomac View Post
I thought the 2017 2500HD and 3500 Diesel trucks with the snow plow prep package came with #6000 torsen bars


The trucks with the snow plow prep package do come with the 6000 lb front axle rating.
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Old 04-06-2017, 10:43 PM   #10 (permalink)
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My 2015 GMC 3500 work truck was ordered with the plow package and it has the 6000 lb front axle rating. I still cranked the torsion bars though. I have a fisher V plow and it is heavy, works great though.

Does anyone know if dual alternators can be added after the fact, or does it have to be a factory add on?

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