72 c10 alternator question
 

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

Re: 72 c10 alternator question
 

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

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

Re: 72 c10 alternator question
 

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

$59.00 delivered amazon no core required

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.

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.

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

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.

Re: 72 c10 alternator question
 

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

Re: 72 c10 alternator question
 

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

Re: 72 c10 alternator question
 

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.