72 c10 alternator question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BCOWANWHEELS · 10-21-2021, 11:04 PM

can somebody tell me the ac delco alternater part number. my truck has a/c and a 350 engine. thanks

**'68OrangeSunshine** · 10-21-2021, 11:08 PM

10 SI? Or did you want the 7 or 8 digit GM number?

BCOWANWHEELS · 10-21-2021, 11:17 PM

i need to buy one and my local parts places want almost a hundred bucks plus tax. there 45.00 on amazon but i need the correct a/c delco number to get the highest output. i dont want a 1 wire or internally regulater. just a stock hi output direct replacement.
thanks

BCOWANWHEELS · 10-22-2021, 12:06 AM

found it.....
gm number 19135685
ac delco gold 3342127
63 amp

$59.00 delivered amazon no core required

**FirstOwner69** · 10-22-2021, 12:36 AM

Rock Auto shows that as the 2 groove pulley version. They also have the single groove version. Their price on either is only $32.99 including a $6 core charge. Shipping and sales tax is additional.

**Accelo** · 10-22-2021, 12:57 AM

As you can see there are a bunch to choose from.
They go from lowest amperage to the highest at the bottom.

BCOWANWHEELS · 10-22-2021, 01:45 AM

yes i want a 2 groove pulley because my a/c isnt restored yet this way i can have dual wp / alt belts and its 63 amp

**HO455** · 10-22-2021, 12:46 PM

Be aware if your truck came with the 37 amp alternator it has a different wiring harness than a truck that came with the 63 amp alternator.
This is not shown on any of the commonly available schematics. The 2 that I have parted the harnesses weren't in the best shape so I've never seen a complete unmolested one. But there are definite differences.

BigBird05 · 10-22-2021, 02:26 PM

HO455 is the difference in the gauge size of the output wire?

BCOWANWHEELS · 10-22-2021, 05:03 PM

for decades i,ve upgraded the alternators with no problems ever. its not like your drawing max amps constantly

**HO455** · 10-22-2021, 09:08 PM

Quote:

Originally Posted by BigBird05

HO455 is the difference in the gauge size of the output wire?

The most complete one I've seen appeared the have the same size wire but there were 2 of them coming off the alternator. One went to an insulated post (Same style as the one next to the battery) near the horn location. There was a second post a couple of inches from the one with a jumper wire between them and some other wires to the voltage regulator.
The other wire I assume went to the battery like normal but, the harness was seriously hacked and it wasn't worth saving so I trashed it.
I wish I could come across a complete one to see how GM actually wired it. It is possible that GM just added a second harness to a regular 37 amp harness.
I believe the extra posts were provided to allow customers a place to hook their large amperage loads near or at the junction point of the main harness where proper voltage sensing would occur.

10-21-2021, 11:04 PM	#1
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	72 c10 alternator question can somebody tell me the ac delco alternater part number. my truck has a/c and a 350 engine. thanks __________________ I BELIEVE IN JOHN 3:16

10-21-2021, 11:08 PM	#2
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,514	Re: 72 c10 alternator question 10 SI? Or did you want the 7 or 8 digit GM number? __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.

10-21-2021, 11:17 PM	#3
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	Re: 72 c10 alternator question i need to buy one and my local parts places want almost a hundred bucks plus tax. there 45.00 on amazon but i need the correct a/c delco number to get the highest output. i dont want a 1 wire or internally regulater. just a stock hi output direct replacement. thanks __________________ I BELIEVE IN JOHN 3:16

10-22-2021, 12:06 AM	#4
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	Re: 72 c10 alternator question found it..... gm number 19135685 ac delco gold 3342127 63 amp $59.00 delivered amazon no core required __________________ I BELIEVE IN JOHN 3:16

10-22-2021, 12:36 AM	#5
FirstOwner69 Senior Member Join Date: May 2010 Location: Wisconsin & Arizona Posts: 4,852	Re: 72 c10 alternator question Rock Auto shows that as the 2 groove pulley version. They also have the single groove version. Their price on either is only $32.99 including a $6 core charge. Shipping and sales tax is additional. __________________ Jim Last edited by FirstOwner69; 10-22-2021 at 12:44 AM.

10-22-2021, 12:57 AM	#6
Accelo Senior Member Join Date: Mar 2015 Location: washington Posts: 2,301	Re: 72 c10 alternator question As you can see there are a bunch to choose from. They go from lowest amperage to the highest at the bottom. Attached Images

10-22-2021, 01:45 AM	#7
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	Re: 72 c10 alternator question yes i want a 2 groove pulley because my a/c isnt restored yet this way i can have dual wp / alt belts and its 63 amp __________________ I BELIEVE IN JOHN 3:16

10-22-2021, 12:46 PM	#8
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,393	Re: 72 c10 alternator question Be aware if your truck came with the 37 amp alternator it has a different wiring harness than a truck that came with the 63 amp alternator. This is not shown on any of the commonly available schematics. The 2 that I have parted the harnesses weren't in the best shape so I've never seen a complete unmolested one. But there are definite differences. __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

10-22-2021, 02:26 PM	#9
BigBird05 Registered User Join Date: Aug 2019 Location: Cheraw Posts: 1,300	Re: 72 c10 alternator question HO455 is the difference in the gauge size of the output wire?

10-22-2021, 05:03 PM	#10
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	Re: 72 c10 alternator question for decades i,ve upgraded the alternators with no problems ever. its not like your drawing max amps constantly __________________ I BELIEVE IN JOHN 3:16



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