CUCV II 6.5 Alternator type

[JTRUCKJMC]

Does any one know the Type (CS130?) and p/n's of the alternators on a 6.5 Diesel CUCV
II. Are they isolated ground. Updating a 6.2 with serp set up with 24/12 volt system. THX

 

[87cr250r]

Very interested. I put a dual alternator serpentine setup from a 2001 C3500 in my M1008 CUCV. I used standard CS130 alternators and sleeved the mounting holes to isolate one. Not ideal but it works.

There are pigtail adapters so you don't have to cut your stock harness and the gen lights will still work on the dash.

JT&T (2771F) 2-Wire GM Alt Harness Pigtail Adapts (SI Series) to (CS Series) w/ Alt Warning Light

JT&T (2771F) 2-Wire GM Alternator Harness Pigtail Adapts Older GM Vehicles (SI Series) to Newer GM Vehicles (CS Series) w/ Alternator Warning Light, 1988 - 1995, 1 Pc. ( PT2145 / 88861073 )

www.wiringdepot.com

 

[Barrman]

I don’t have an exact answer for you. The 6.5 serpentine belt set up had an early set up with the alternator on the driver side and a later set up with the alternator on the passenger side of a single alternator system.

The early set up was made for the CS130. Actually, with a pulley swap a 27SI would bolt in.

The later set up was for the CS130D and CS144 alternators. A duramax DS244 will also bolt right up.

So, what year 6.5 set up are you writing about?

 

[87cr250r]

It was the latter set, I think 1996+. The specific truck it came from was a 2001 C3500 with a single alternator mounts on passenger side. There is an additional bracket necessary for the second alternator, these guys are making a reproduction of it. The setup also supports A/C. The serpentine belt is over 10 feet long.

96-00 6.5L Diesel Dual Alternator Bracket

Designed for use on 96-2000 6.5 diesel serpentine accessory drive systems, this bracket sets the mounting points for a parallel CS130 alternator. This is a direct replacement/upgrade for the long discontinued GM bracket (PN10244209), with a few notable upgrades of my own design: TIG welded...

www.willometmotorandfab.com

You can make your own bracket from 1/4 plate and some washers.

 

[JTRUCKJMC]

Thanks for all your replies. To clarify it is a 1996 - 2001 style serp system with the AC on the drivers side.
I have the Willomet bracket. I like the isolated mount idea, I will look at that. I have seen early CUCV II engine pics with the dual alts, but I find nothing about them anywhere. I need to find the name of conversion company that did the upgrades after GM shipped them. The 27SI has a different mount scheme all together so they will not mount up.

 

[Barrman]

I was thinking 12si when I wrote that the CS130 and it were the same mount. Sorry. I also miss named the AD244. I have no clue what a DS244 is or why I wrote that.

Here is a video comparing different GM alternators over the decades, their mounts and plugs:

 

[JTRUCKJMC]

I was thinking 12si when I wrote that the CS130 and it were the same mount. Sorry. I also miss named the AD244. I have no clue what a DS244 is or why I wrote that.

Here is a video comparing different GM alternators over the decades, their mounts and plugs:

Your alright I understood what you were trying to say. THX

 

[JTRUCKJMC]

Very interested. I put a dual alternator serpentine setup from a 2001 C3500 in my M1008 CUCV. I used standard CS130 alternators and sleeved the mounting holes to isolate one. Not ideal but it works.

There are pigtail adapters so you don't have to cut your stock harness and the gen lights will still work on the dash.

JT&T (2771F) 2-Wire GM Alt Harness Pigtail Adapts (SI Series) to (CS Series) w/ Alt Warning Light

JT&T (2771F) 2-Wire GM Alternator Harness Pigtail Adapts Older GM Vehicles (SI Series) to Newer GM Vehicles (CS Series) w/ Alternator Warning Light, 1988 - 1995, 1 Pc. ( PT2145 / 88861073 )

www.wiringdepot.com

So a few questions on your set up. Did you isolate the drivers side alt? Bore and bush the alt mount holes with a phenolic non conductive bushing? How did you hook up the wire that runs to the pass alt since there is no stud for ground. AD244 may be the best upgrade alt possibly. THX

 

[87cr250r]

The driver's side alt is unmodified. I made no modifications to the CUCV wiring harness.

As a prefice, I generally source materials from McMaster-Carr as I use them daily in my normal job. I drilled out the passenger side alternator and sleeved it with some nylon air brake tubing. I used Garolite washers on the sides. I ground the engine side bracket for clearance. The idea was to minimize the amount of work it would take to fit a replacement alternator in the event or a failure. I painted the PS alternator with Plasti-dip as well in case I drop a wrench across it. Everything works right now, even better than original, but I still want an isolated alternator.

The only wire I didn't hook up was for the tach in the diagnostics tool. None of us have that tool so it doesn't really matter. I installed the 6.5 timing cover which has a pulse generator if I ever do want a tach.

I can get pics tomorrow.

 

[JTRUCKJMC]

The driver's side alt is unmodified. I made no modifications to the CUCV wiring harness.

As a prefice, I generally source materials from McMaster-Carr as I use them daily in my normal job. I drilled out the passenger side alternator and sleeved it with some nylon air brake tubing. I used Garolite washers on the sides. I ground the engine side bracket for clearance. The idea was to minimize the amount of work it would take to fit a replacement alternator in the event or a failure. I painted the PS alternator with Plasti-dip as well in case I drop a wrench across it. Everything works right now, even better than original, but I still want an isolated alternator.

The only wire I didn't hook up was for the tach in the diagnostics tool. None of us have that tool so it doesn't really matter. I installed the 6.5 timing cover which has a pulse generator if I ever do want a tach.

I can get pics tomorrow.

I am a McMaster fan as well, been using them for 30 years. I have the 6.5 timing cover and 4 sprocket crank gear and am tapping for a sensor and digital box for 4l80e upgrade, which will give me a tach source. I am leaning towards using AD244 alts but I am still investigating. I will probably isolate both once figured out.
Do you install an isolated stud somewhere for the ground circuit?

 

[87cr250r]

I isolated the alternator body from the bracket. I did not isolate the stud. Don't drop a wrench on it! I used Plasti-dip as a bit of a safety but it's not thick or durable. I may re-apply something thicker. I think I decided the way the rectifier installs made it impossible to isolate. I forgot why I came to that conclusion.

 

[JTRUCKJMC]

I isolated the alternator body from the bracket. I did not isolate the stud. Don't drop a wrench on it! I used Plasti-dip as a bit of a safety but it's not thick or durable. I may re-apply something thicker. I think I decided the way the rectifier installs made it impossible to isolate. I forgot why I came to that conclusion.

THX, I guess the AS244 can not be made isolated. I will keep searching.