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Duramax Sixth Generation: 2017+ (L5P) Discuss the sixth generation (2017+) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.

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Old 04-09-2017, 08:25 PM   #1 (permalink)
D.Camilleri
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Adding Dual Alternators

Does anyone know how hard or if even possible to add a second alternator to a 2017 L5P? Factory alternator is 150 amps, but I would like to add a 220 amp. Can you buy the alternator and wiring harness and new belt?

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Old 04-09-2017, 08:37 PM   #2 (permalink)
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Quote:
Originally Posted by D.Camilleri View Post
Does anyone know how hard or if even possible to add a second alternator to a 2017 L5P? Factory alternator is 150 amps, but I would like to add a 220 amp. Can you buy the alternator and wiring harness and new belt?




Check these people out Nations Auto Electric (1 alternator)this is there 260 amp alt 175amps at idle AD-244 Pro Series Alternator

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Old 04-09-2017, 10:17 PM   #3 (permalink)
redwngr
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Should be able to.

The optional 220A alternator is:
KW5 Alternator, 220 amps

Some on lots 'here' have that option added.

And factory dual alternators is:
KHB Alternators, dual, 150 amps and 220 amps each

They gotta have parts available for service and/or crash usage.

(duals are only available with the duramax)
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Old 04-09-2017, 11:58 PM   #4 (permalink)
D.Camilleri
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I asked a dealer and he said only way to get duals was to factory order, but I can't imagine a separate wiring harness just for dual alternators. I am thinking about adding a 16.5 electric winch and 150 amps isn't enough to keep up. Duals would be the way to go. I installed a 200 amp on my 02 and my 12k winch made it get very hot, then I switched to a hydraulic winch.
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2017 3500HD CCLB Black on Black LTZ Loaded L5P, Banks Derringer with I dash, Ranch Hand bumper with 18K superwinch talon, Curt 20k puck hitch, 60 gallon aluminum transfer tank with electric pump, Onan Quiet Diesel 5500 for extra weight in the bed, Cooper STT PRO 285/65R18 and Vision Manic wheels. 2nd set of tires and wheels, Cepek Trail Country EXP 285/65R18 on Ultra Predator II Black/Machined 18x9

2018 Solitude 310GK fifth wheel with a 12' Haulmark tag trailer to haul toys in.

1997 Jeep TJ, Currie 8.8 high pinion axles front and rear with ARB air lockers, 4.56, 5 on 5.5 with warn hub kit, Atlas II transfer case with Klune V doubler, 4 inch Currie Lift and 35x12.50x15 Mickey Thompson MTZ on 15x10 Mickey Thompson wheels, Ramsey 9500 winch, hydraulic ram assist steering, on board welder and on board air, custom aluminum fuel tank.
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Old 04-10-2017, 01:23 PM   #5 (permalink)
redwngr
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Sales dept? or parts/service?
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Old 04-10-2017, 07:15 PM   #6 (permalink)
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I asked the salesman, and he said he had asked the service department for another customer. Not that I trust a salesman The link above shows dual alternators for gas engines, so they might have what it takes to install on the diesel also.
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2017 3500HD CCLB Black on Black LTZ Loaded L5P, Banks Derringer with I dash, Ranch Hand bumper with 18K superwinch talon, Curt 20k puck hitch, 60 gallon aluminum transfer tank with electric pump, Onan Quiet Diesel 5500 for extra weight in the bed, Cooper STT PRO 285/65R18 and Vision Manic wheels. 2nd set of tires and wheels, Cepek Trail Country EXP 285/65R18 on Ultra Predator II Black/Machined 18x9

2018 Solitude 310GK fifth wheel with a 12' Haulmark tag trailer to haul toys in.

1997 Jeep TJ, Currie 8.8 high pinion axles front and rear with ARB air lockers, 4.56, 5 on 5.5 with warn hub kit, Atlas II transfer case with Klune V doubler, 4 inch Currie Lift and 35x12.50x15 Mickey Thompson MTZ on 15x10 Mickey Thompson wheels, Ramsey 9500 winch, hydraulic ram assist steering, on board welder and on board air, custom aluminum fuel tank.
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Old 04-10-2017, 07:38 PM   #7 (permalink)
redwngr
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I'll check with the GM dealer I use, later this week.

They do enough truck mods for customers that I expect they will know about this issue.
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Old 04-23-2017, 04:25 AM   #8 (permalink)
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I might just add a high amperage single like the 260 amp that Nations has. I emailed them, so we will see what the choices are. I ordered a new 18k electric winch, so I prefer to have some extra charging so that the batteries don't go in the hole quite as fast.
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2017 3500HD CCLB Black on Black LTZ Loaded L5P, Banks Derringer with I dash, Ranch Hand bumper with 18K superwinch talon, Curt 20k puck hitch, 60 gallon aluminum transfer tank with electric pump, Onan Quiet Diesel 5500 for extra weight in the bed, Cooper STT PRO 285/65R18 and Vision Manic wheels. 2nd set of tires and wheels, Cepek Trail Country EXP 285/65R18 on Ultra Predator II Black/Machined 18x9

2018 Solitude 310GK fifth wheel with a 12' Haulmark tag trailer to haul toys in.

1997 Jeep TJ, Currie 8.8 high pinion axles front and rear with ARB air lockers, 4.56, 5 on 5.5 with warn hub kit, Atlas II transfer case with Klune V doubler, 4 inch Currie Lift and 35x12.50x15 Mickey Thompson MTZ on 15x10 Mickey Thompson wheels, Ramsey 9500 winch, hydraulic ram assist steering, on board welder and on board air, custom aluminum fuel tank.
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Old 04-24-2017, 08:15 PM   #9 (permalink)
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Go with the single 260. Adding duals will add obviously the alt. then brackets, then a parallel harness. Doubt you get a good discount on those parts so then the 260 is cheaper and then you don't have to alts in your way down the road when servicing the truck.
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Old 04-24-2017, 08:20 PM   #10 (permalink)
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I do know that class 8 trucks that use dual alternators have a specific "leader" and a "follower" along with the electronics to make them work together. I would look towards the upgraded single for simplicity.

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