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GMC V6 and V12 Engines Engine repair and rebuilding

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  #1  
Old January 12th, 2021, 03:28 AM
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Default What pulleys for P/S and A/C

Lost my file or deleted my file with pics of what they look like. How many pulleys and how many grooves do I need?
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Old January 12th, 2021, 05:13 AM
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Default Re: What pulleys for P/S and A/C

Pretty sure you just need the one crankshaft pulley, and if you want both ps and ac, three grooves. Tough to find three groovers though. You might be able to get one made at a speed shop though pretty easy.
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Old January 12th, 2021, 06:09 AM
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Default Re: What pulleys for P/S and A/C

Ok thank you FMAP. I will start looking. So what goes in the three grooves. 1. Alternator/water pump. 2. A/C. 3. P/S ??
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Old January 12th, 2021, 06:37 AM
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Default Re: What pulleys for P/S and A/C

AZKen; I remember this post here...

https://6066gmcclub.com/showthread.p...uburban&page=5

it's GMCNUT's Kool Suburban with all the goodies your looking to add.

Per one of the last posts he mentions that the AC was a double groove with a bolt-on single groove for the AC.

I'm not sure if they all did it that way, but his was set up like that.

Here is a photo I have from an eBay listing of said lower pulley and also the upper and lower double groove pulleys from the archives.
Attached Images
File Type: jpg IMG_5534.JPG (1.80 MB, Multiple views, 0 clicks)
File Type: jpg IMG_5535.JPG (1.71 MB, Multiple views, 0 clicks)
File Type: jpg IMG_5537.JPG (2.39 MB, Multiple views, 1 clicks)
File Type: jpg IMG_4915.JPG (1.61 MB, Multiple views, 1 clicks)
File Type: jpg IMG_4918.JPG (1.82 MB, Multiple views, 1 clicks)
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Old January 12th, 2021, 10:25 PM
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Default Re: What pulleys for P/S and A/C

Thank you everybody. I got the answer I was looking for.
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