CA 12SI Alternator - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**pjmoreland** · 01-30-2023, 02:23 PM

I bought this 94A 12SI alternator new from O'Reilly about two years ago. I've put about 7000 miles on it in that time, and it has worked flawlessly. It fits the original 67-72 brackets. I no longer need it because I switched to a CS130 alternator based on recommendations for an EFI installation.

https://www.oreillyauto.com/detail/c...R111785A&pos=0

Also included are the conversion plug adapters required to convert from an original externally regulated setup. You can pop the terminals out of your original alternator connector and pop them into the replacement connector. The larger connector plugs into the harness in place of the original voltage regulator. I don't remember where I bought the conversion adapter, but it is this type:

https://www.summitracing.com/parts/a...0aAoZSEALw_wcB

This alternator goes for $128.99 + $16.00 core, and the conversion plug adapters go for $22.50 + shipping.

$80 shipped.

Money order only.

**pjmoreland** · 02-01-2023, 05:54 PM

I'm open to offers

**pjmoreland** · 02-03-2023, 03:41 PM

Price lowered

**pjmoreland** · 02-10-2023, 07:43 PM

ttt

**Stocker** · 02-11-2023, 12:54 AM

Bump and a free plug for ya. That is the same alternator I bought from O'Reilly's back in 2018 after having electrical problems.

It's a very nice unit, glad I got it (and fixed my problems, thanks to some very helpful board members). Good luck with the sale!

**Tmend** · 02-11-2023, 01:19 PM

I’ll take it sir

**Rich72C10** · 02-11-2023, 03:20 PM

To bad I miss this one, switching to a internal regulated alternator has been on my list for some time.

Though how does the dash gauge react to this change out? Sorry to ask in a sale thread...

**Stocker** · 02-11-2023, 03:25 PM

Quote:

Originally Posted by Rich72C10

To bad I miss this one, switching to a internal regulated alternator has been on my list for some time.

Though how does the dash gauge react to this change out? Sorry to ask in a sale thread...

I still have the original ammeter and it works same as it always has.

**pjmoreland** · 02-12-2023, 03:40 AM

Quote:

Originally Posted by Stocker

Bump and a free plug for ya. That is the same alternator I bought from O'Reilly's back in 2018 after having electrical problems.

It's a very nice unit, glad I got it (and fixed my problems, thanks to some very helpful board members). Good luck with the sale!

Thank you for the free plug!

Quote:

Originally Posted by Stocker

I still have the original ammeter and it works same as it always has.

Yep. That was my experience, as well.

Quote:

Originally Posted by Tmend

I’ll take it sir

PM sent.

**pjmoreland** · 02-12-2023, 12:52 PM

Sold to Tmend

01-30-2023, 02:23 PM	#1
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,289	12SI Alternator I bought this 94A 12SI alternator new from O'Reilly about two years ago. I've put about 7000 miles on it in that time, and it has worked flawlessly. It fits the original 67-72 brackets. I no longer need it because I switched to a CS130 alternator based on recommendations for an EFI installation. https://www.oreillyauto.com/detail/c...R111785A&pos=0 Also included are the conversion plug adapters required to convert from an original externally regulated setup. You can pop the terminals out of your original alternator connector and pop them into the replacement connector. The larger connector plugs into the harness in place of the original voltage regulator. I don't remember where I bought the conversion adapter, but it is this type: https://www.summitracing.com/parts/a...0aAoZSEALw_wcB This alternator goes for $128.99 + $16.00 core, and the conversion plug adapters go for $22.50 + shipping. $80 shipped. Money order only. Attached Images Last edited by pjmoreland; 02-03-2023 at 03:41 PM.

02-01-2023, 05:54 PM	#2
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,289	Re: 12SI Alternator I'm open to offers

02-03-2023, 03:41 PM	#3
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,289	Re: 12SI Alternator Price lowered

02-10-2023, 07:43 PM	#4
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,289	Re: 12SI Alternator ttt

02-11-2023, 12:54 AM	#5
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,499	Re: 12SI Alternator Bump and a free plug for ya. That is the same alternator I bought from O'Reilly's back in 2018 after having electrical problems. It's a very nice unit, glad I got it (and fixed my problems, thanks to some very helpful board members). Good luck with the sale! __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

02-11-2023, 01:19 PM	#6
Tmend Senior Member Join Date: Nov 2010 Location: Reseda CA Posts: 1,261	Re: 12SI Alternator I’ll take it sir __________________ Some progress is better then no progress

02-11-2023, 03:20 PM	#7
Rich72C10 Mr. Cheyenne Join Date: Jun 2020 Location: Kyle, Texas Posts: 1,643	Re: 12SI Alternator To bad I miss this one, switching to a internal regulated alternator has been on my list for some time. Though how does the dash gauge react to this change out? Sorry to ask in a sale thread... __________________ Richard *'72 Chevy C10 Cheyenne Super WHT/MED BRONZE/WHT SBC 350 \| TH350 \| LWB \| AC \| Buddy Seats Upgrades:** Tilt \| Front Sway Bar \| Radio \| Sliding Window \| Bed Spare w/Lock Bed Rails \| Full LEDs \| Courtesy Lights \| Tachometer \| Glovebox Lock & Light \| Head Light Relays \| *Upgraded Fully Super Trim

02-12-2023, 12:52 PM	#10
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,289	Re: 12SI Alternator Sold to Tmend



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